[jira] [Resolved] (PDFBOX-2483) StackOverflowError in preflight

Tilman Hausherr (JIRA) Thu, 20 Nov 2014 14:26:49 -0800

     [ 
https://issues.apache.org/jira/browse/PDFBOX-2483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]


Tilman Hausherr resolved PDFBOX-2483.
-------------------------------------
    Resolution: Fixed

> StackOverflowError in preflight
> -------------------------------
>
>                 Key: PDFBOX-2483
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2483
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Preflight
>    Affects Versions: 1.8.7, 1.8.8, 2.0.0
>            Reporter: Tilman Hausherr
>            Assignee: Tilman Hausherr
>             Fix For: 2.0.0
>
>         Attachments: 002874.pdf, 034379.pdf, 048873.pdf
>
>
> I get a stack overflow with the attached file. I can't even get the full 
> trace.
> {code}
> Exception in thread "main" java.lang.StackOverflowError
>       at java.util.regex.Pattern$Single.<init>(Unknown Source)
>       at java.util.regex.Pattern.newSingle(Unknown Source)
>       at java.util.regex.Pattern.atom(Unknown Source)
>       at java.util.regex.Pattern.sequence(Unknown Source)
>       at java.util.regex.Pattern.expr(Unknown Source)
>       at java.util.regex.Pattern.compile(Unknown Source)
>       at java.util.regex.Pattern.<init>(Unknown Source)
>       at java.util.regex.Pattern.compile(Unknown Source)
>       at java.lang.String.replaceAll(Unknown Source)
>       at 
> org.apache.pdfbox.pdmodel.font.ExternalFonts.getSubstitutes(ExternalFonts.java:208)
>       at 
> org.apache.pdfbox.pdmodel.font.ExternalFonts.getTrueTypeFont(ExternalFonts.java:384)
>       at 
> org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.<init>(PDTrueTypeFont.java:144)
>       at 
> org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:81)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.getFonts(ResourcesValidationProcess.java:127)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateFonts(ResourcesValidationProcess.java:93)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:76)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validateXObjectResources(XObjFormValidator.java:178)
>       at 
> org.apache.pdfbox.preflight.xobject.XObjFormValidator.validate(XObjFormValidator.java:75)
>       at 
> org.apache.pdfbox.preflight.process.reflect.GraphicObjectPageValidationProcess.validate(GraphicObjectPageValidationProcess.java:70)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
>       at 
> org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:52)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validateXObjects(ResourcesValidationProcess.java:288)
>       at 
> org.apache.pdfbox.preflight.process.reflect.ResourcesValidationProcess.validate(ResourcesValidationProcess.java:80)
> {code}



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