Microsoft: August updates break printing, PDF export in WPF apps
4 Articles
4 Articles
Microsoft acknowledges printing and PDF problems after August updates
If you are experiencing problems printing documents or creating PDFs, Microsoft says that the cause could well be a recent update. This time around, however, it is not updates for Windows 11 that are to blame, but the August 2026 .NET Framework cumulative update. Microsoft has acknowledged reports that after installing this update, some applications may generate an error when printing or when creating PDF or XPS files from documents that contain…
Bad surprise for some users who have deployed the cumulative update for .net 3.5 and 4.8 for Windows and Windows Server. Applications using WPF can be impacted with a broken PDF/ XPS printing or generation. The problem is on System.IO.FileFormatException with some fonts including Calibri. Microsoft is working on a permanent solution. Meanwhile, it is possible to bypass the problem with Switch.MS.Internal.TtfDelta.DisableCmapAndSbitOverflowProtec…
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