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https://issues.apache.org/jira/browse/PDFBOX-5559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17679622#comment-17679622
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Tilman Hausherr commented on PDFBOX-5559:
-----------------------------------------
Ok, the reuploaded [^sample_modified.pdf] now shows the same problem I
mentioned (qpdf hints at it too: "creating a new page object as a copy"). I
downloaded qpdf and ran it, and the warning also comes for the initial file
[^sample.pdf] .
!screenshot-2.png!
Re file.pdf, if PDFBox touched it, then yeah, please create a new issue. I'll
close this one.
> QPDF prints warnings about a PDF modified by PDFBOX
> ----------------------------------------------------
>
> Key: PDFBOX-5559
> URL: https://issues.apache.org/jira/browse/PDFBOX-5559
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 2.0.27
> Reporter: menteith85
> Priority: Minor
> Attachments: sample.pdf, sample_modified.pdf, screenshot-1.png,
> screenshot-2.png
>
>
> Hi!
> I created a sample PDF file with PDAnnotationLink using PDFBox. Then I
> changed action from PDActionURI to PDActionGoTo. The modified pdf is
> correctly working in Okular (a pdf viewer for Linux) but *qpdf* (version
> 11.2.0) emits the following warning:
> {code:java}
> ❯ qpdf --linearize --replace-input sample_modified.pdf
> WARNING: sample_modified.pdf, object 2 0 at offset 88: kid 1 (from 0) appears
> more than once in the pages tree; creating a new page object as a copy
> qpdf: there are warnings; original file kept in
> sample_modified.pdf.~qpdf-orig
> qpdf: operation succeeded with warnings; resulting file may have some
> problems{code}
> Please find below the code I used to modify pdf. I can also provide code to
> create that pdf if needed.
> {code:java}
> final PDPage page = doc.getPage(0);
> final PDPageXYZDestination destination = new PDPageXYZDestination();
> destination.setPage(page);
> final PDActionGoTo action = new PDActionGoTo();
> action.setDestination(destination);
> final PDAnnotationLink annotationLink = new PDAnnotationLink();
> annotationLink.setAction(action);
> float X_MARGIN_LEFT = 50F;
> float BOX_WIDTH = 240F;
> float TEXT_LINE_HEIGHT = 14F;
> final PDRectangle position = new PDRectangle();
> final int x = 120;
> final int y = 120;
> position.setLowerLeftX(x);
> position.setLowerLeftY(y);
> position.setUpperRightX(X_MARGIN_LEFT + BOX_WIDTH);
> position.setUpperRightY(y + TEXT_LINE_HEIGHT);
> annotationLink.setRectangle(position);
> page.setAnnotations(List.of(annotationLink));
> doc.save("sample_modified.pdf");{code}
>
> *qpdf* complains also about a different pdf (copyrighted) modified in similar
> way. The warning reads:
> {code:java}
> WARNING: file.pdf: reported number of objects (12991) is not one plus the
> highest object number (12989){code}
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