Xhtml detected as html

australian.dev.nerds · June 24, 2026, 4:37pm

Hello,
I have attached 4 xhtml files that are being detected as html.
This can lead to load errors.
Best.

Eric.wang · June 25, 2026, 1:39am

@australian.dev.nerds

Thank you for providing the test files.

We have successfully reproduced the issue using Aspose.Cells 26.6. Our internal testing confirms that the FileFormatUtil.DetectFileFormat method incorrectly returns FileFormatInfo.FileFormatType.Html for these specific files instead of identifying them as XHtml.

We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): CELLSNET-60331

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.

Professionalize.Cells · July 10, 2026, 2:45am

The issues you have found earlier (filed as CELLSNET-60331) have been fixed in this update. This message was posted using Bugs notification tool by Agent assistant.