Hello- When trying to fill in values into a form, I'm encountering the error shown below, which means nothing to me. It's not just for the first field it encounters - if I comment that out, it happens for the next field.
The form (an official government PDF) doesn't seem different from any number of other ones we are successfully filling out; it can be found at https://ulfdittmer.com/pdfbox/Guide_BW.pdf The source code is also similar to other codes we use for other forms: https://ulfdittmer.com/pdfbox/StreamQRApplForm.java It uses the following font, which is also standard https://ulfdittmer.com/pdfbox/Arial.ttf Are we doing something wrong? Is the PDF weird? Is there a way around this issue? Many thanks in advance for any help you can supply. Ulf Jun 03, 2025 5:21:00 PM org.apache.pdfbox.pdfparser.BaseParser parseCOSDictionaryNameValuePair WARNING: Empty COSName at offset 940 Exception in thread "main" java.io.IOException: Could not process default appearance string ' 13 0 g' for field 'Name ggf Geburtsname': Missing operands for set non stroking color operator [COSInt{13}, COSInt{0}] at org.apache.pdfbox.pdmodel.interactive.form.AppearanceGeneratorHelper.<init>(AppearanceGeneratorHelper.java:123) at org.apache.pdfbox.pdmodel.interactive.form.PDTextField.constructAppearances(PDTextField.java:261) at org.apache.pdfbox.pdmodel.interactive.form.PDTerminalField.applyChange(PDTerminalField.java:209) at org.apache.pdfbox.pdmodel.interactive.form.PDTextField.setValue(PDTextField.java:218) at StreamQRApplForm.setField(StreamQRApplForm.java:67) at StreamQRApplForm.main(StreamQRApplForm.java:28) Caused by: java.io.IOException: Missing operands for set non stroking color operator [COSInt{13}, COSInt{0}] at org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.processSetFontColor(PDDefaultAppearanceString.java:202) at org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.processOperator(PDDefaultAppearanceString.java:133) at org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.processAppearanceStringOperators(PDDefaultAppearanceString.java:105) at org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.<init>(PDDefaultAppearanceString.java:87) at org.apache.pdfbox.pdmodel.interactive.form.PDVariableText.getDefaultAppearanceString(PDVariableText.java:105) at org.apache.pdfbox.pdmodel.interactive.form.AppearanceGeneratorHelper.<init>(AppearanceGeneratorHelper.java:117) ... 5 more
