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GroupDocs.Annotation does not work with PDF/A compliance file

While working with GroupDocs.Annotation API, I noticed that it does not work with PDF/A compliance files.

You can test the API with any PDF file by inserting watermark, link, other components.


Please share following details:

  • Sample code
  • API variant (Java or .NET) and version
  • Problematic file

You can add any annotation like watermark, link etc. to reproduce this issue.

e.g. https://gist.github.com/groupdocs-com-kb/f5b515d1ea496713e465c1dc650b2a1e#file-how-to-add-watermark-annotation-to-pdf-using-c-cs


You can use any PDF file with with PDF/A compliance


Please take a look at these files.zip (516.3 KB). The example.pdf is a PDF/A compliance file and using this code, I cannot reproduce the issue.


Please use .NET 6.0 to reproduce this issue.

We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.


You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.