Document not saved after modification

Product: PDFTron WebViewer

Product Version: 8.10.0-20221128

Please give a brief summary of your issue:
We have upgraded from 8.7 to 8.10. In 8.7 save functionality was working as expected. But after upgrade to 8.10 when we try to save modified document it doesn’t get saved.
Unable to save document after modification individual or side-by-side.

There are no code changes from 8.7 to 8.10 and the payload.

Please describe your issue and provide steps to reproduce it:

  1. Open 2 documents in side-by-side.
  2. Rotate a page in second document and save.

Expected result: Documents should be saved
Actual result: Document are not saved.

Other Save related defects:-

  1. select two documents in document tracking and do side by side view
  2. Delete pages from the left document by selecting delete option from thumbnail
    3.Extract and delete page from the document by selecting Extract option from thumbnail
    4.Select a page from right document and select move to bottom from thumbnail

Actual Result: The documents are not saved.
Expected result: Actual Result: The documents should be saved.


Issue is faced with few documents and the documents having 1 page not saved after being modified.

Issue is intermittent with chrome, Firefox and edge.

Please provide a link to a minimal sample where the issue is reproducible:



Thank you for contacting us about WebViewer and for reporting this issue. Can I get some information about how your set up works?

  • How are you saving the document?
    • Are you calling “getFileData” and sending that data to a sever? (Is the data at this point correct)
    • Does saving annotations work? (is only changed to document pages broken?)
  • Are there any error messages in your browser console?

Also are you able to reproduce this issue in our demo below?
Page manipulation demo

Thank you

Best Regards,
Andrew Yip
Software Developer
PDFTron Systems, Inc.

Hi Andrew,

  1. getFileData is used and the data is correct.
  2. Not using annotation.
  3. *Are there any error messages in your browser console? – No

Best Regards,

Hi Andrew,

I am able to manipulate document but i don’t see option to save it in demo.

Best Regards,

Hi Andrew,

Is it possible to get on a call and review the issue?

Thank you,


Hi Andrew,

Any update.

Best Regards,

Hi there,

You mentioned there were no code changes from your end from the upgrade (8.7 → 8.10)
There should be no breaking changes, but please take a look at our change-log section to see if there were potential changes:

Does the change take effect if you rotate the 1st document instead of the 2nd document?
Could you try downloading our latest package in PDFTron Developer Portal and implement your ‘save’ functionality and see if you can reproduce the issue?

If the above methods do not work, can you please share your code sample on how you were saving the document?

Thank you in advance.

Best regards,
Kevin Kim