Hi, I’m having repeated crashes and font‑related warnings when using Seamly2D on Windows 11. The issue happens every time I start the program and again when I open any pattern file. I also cannot cha…

Hello, @samitapani Firstly, you do need to update your Seamly2D software, and keeping old versions is fine but one normally only keep them if there is a risk of opening a very old pattern that hasn’t…

[image] samitapani: Because the issue appears across multiple Seamly2D versions, it may be related to how Seamly2D (or Qt) initializes fonts on Windows 11, especially when MS Sans Serif is request…

Thank you both for the replies! Just to clarify a few things: I am already using the newest Seamly2D version (2025.11.17.210), and this is the version where the issue appears. I also tested sev…

Thank you for the suggestions! I checked my system in more detail and wanted to clarify a few important points. The issue started suddenly while I was working on a pattern. Seamly2D closed itself in …

[image] samitapani: I am already using the newest Seamly2D version (2025.11.17.210), and this is the version where the issue appears. The newest version is 2026.3.2.214 [image] samitapani: …

Thank you for the clarification! Just to add one important correction: I actually am using the newest Seamly2D version (2026.3.2.214). I accidentally wrote the version number incorrectly in my earlie…

Am I understanding you correctly? If you open Seamly without opening a pattern, you can’t edit the font in App Prefs, it closes on you?

[image] samitapani: I checked my C:\Windows\Fonts directory as suggested. MS Sans Serif is present there, but only as a Raster (.fon) system font, Right. It’s an old style bitmap font… thatreal…

Thanks for the explanation! [image] Douglas: Right. It’s an old style bitmap font… thatreally should not even be used anymore. That’s why Qt and the QComboboxes have issue with them. What make…

DirectWrite font error and crash on startup (Windows 11)

Sue Mars 9, 2026, 7:19 18

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