Howto not show the XFA alert

[micniv]

I recently istalled SUMATRA and it seems excellent.
Only when opening most of my PDF documents , an alert is shown "This document uses unsupported features (XFA) and might not render properly"
How to remove it. I don't use XFA docuents.
Thanks !

[GitHubRulesOK]

it should only appear on opening a single page PDF that uses XML (XFA) thus you must have at least one.
However the message is "sticky" until dismissed
So may seem to apply to other files until the XFA file is removed from the session.

XFA files are Adobe proprietary non ISO PDF and supposed to have a cover page PDF that says ONLY open this file in Adobe software, but many public service programmers forget to add the cover sheet or worse use a very old one. There is NO acrobat for Linux!

since I did not remove the XFA the message stays for the next file

Once I remove the file the banner can be dismissed or I can close the banner and if the PDF with XFA is readable as a PDF try to read it

[berndbausch]

This is a one-year old discussion, but I have just started using Sumatra (and like it very much) and was recently faced with the XFA error banner.

it should only appear on opening a single page PDF

may seem to apply to other files until the XFA file is removed from the session.

I suppose this is not a high priority because it's easy to fix. In my case, none of the open documents were one page long, and the banner stayed when all documents were closed. Stopping Sumatra and restarting it removed the banner.