^{Originally posted by inkwell84 July 24, 2023}
Hello,

I am not sure this is a Bug so I did not want to submit it as an "Issue." Perhaps with your guidance we may determine that it is?

I am trying to extract PDF files that attached to a PDF Portfolio file.

I run pdfcpu validate filename.pdf and I get this error:

validating(mode=relaxed) Portfolio of order #8_6-16-23.pdf ...
validation error (obj#:127): pdfcpu: validateNameEntry: dict=colFlddict entry=Subtype invalid dict entry: AFRelationship

I run pdfcpu portfolio list filename.pdf and I get this error:

pdfcpu: validateNameEntry: dict=colFlddict entry=Subtype invalid dict entry: AFRelationship

I run pdfcpu attachment list filename.pdf and I get this error:

pdfcpu: validateNameEntry: dict=colFlddict entry=Subtype invalid dict entry: AFRelationship

Can anyone help me understand what's going on (what can I do to fix?)