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https://issues.apache.org/jira/browse/PDFBOX-2857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14618012#comment-14618012
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Maruan Sahyoun commented on PDFBOX-2857:
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The error message is expected and that's not a bug within PDFBox but a
(current) limitation.
At this point in time there is no (easy) support for a filled out XFA form as
one of the important features needed (incremental update - see PDFBOX-45) is
currently only implemented for signing. Using low level features of PDFBox and
extending the incremental signing you should be able to come up with a
solution. The best is to start looking at how Adobe Reader/Adobe Acrobat save
the file after the form has been filled out. Note that there are some
differences between static XFA forms and dynamic XFA forms.
> Saving XFA document caused prompt saying Extended features has been disabled
> ----------------------------------------------------------------------------
>
> Key: PDFBOX-2857
> URL: https://issues.apache.org/jira/browse/PDFBOX-2857
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.8.9, 2.0.0
> Environment: Windows, Linux
> Reporter: tmjee
> Attachments: sample.pdf
>
>
> Using the following code to read and write back a pdf (with xfa) caused the
> newly written pdf when opened be prompted with
> "This document enabled extended features in Adobe Reader. The document has
> been changed since it was created and use of extended features is no longer
> available. Please contact the author for the original version of this
> document".
> {code:borderStyle=solid}
> File f1 = new File(...);
> PDDocument doc = PDDocument.load(f1);
> doc.setAllSecurityToBeRemoved(true);
> File f = new File(....); // output file
> try (FileOutputStream fos = new FileOutputStream(f)) {
> doc.save(fos);
> }
> {code}
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