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https://issues.apache.org/jira/browse/PDFBOX-4780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17039960#comment-17039960
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Maruan Sahyoun commented on PDFBOX-4780:
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So from looking at the stacktrace there is a wrong entry in the pages
annotations - I'd need the PDF to be sure and check if there is an issue in our
code. But the check is very straight forward - it checks if the value passed to
the methos is a {{COSDictionary}} and otherwise throws the exception printing
the passed value.
>From that it looks like there is a malformed PDF.
> Possible issue on
> org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotation
> -------------------------------------------------------------------------------
>
> Key: PDFBOX-4780
> URL: https://issues.apache.org/jira/browse/PDFBOX-4780
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.18
> Reporter: Jorge Spinsanti
> Priority: Major
>
> When we try to merge several PDFs files, we got the next stacktrace:
> {code:java}
> Caused by: java.io.IOException: Error: Unknown annotation type
> COSName{ICCBased}
> at
> org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotation.createAnnotation(PDAnnotation.java:172)
> at org.apache.pdfbox.pdmodel.PDPage.getAnnotations(PDPage.java:696)
> at org.apache.pdfbox.pdmodel.PDPage.getAnnotations(PDPage.java:663)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.appendDocument(PDFMergerUtility.java:801)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.legacyMergeDocuments(PDFMergerUtility.java:459)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:346)
> {code}
> We cannot details about each PDF involved in merge. Perhaps it is an issue
> but I'm not sure
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