musescore / musescore/MuseScore
Crash when calling FileIO/FileDialog in plugin
@igorkorsukov is already working on this.
Since Jul 31, 2026.
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Description
Issue type
Crash or freeze
Description with steps to reproduce
- Install and activate Orchestrator plugin.
- Open the plugin and press the folder button to Open / Save presets.
- MuseScore crashes.
Supporting files, videos and screenshots
See attached log and dump. From Claude's assessment:
This is very likely a genuine bug in MuseScore Studio 4.7.4's own native FileDialog/PluginAPI implementation on Windows, not something you can fully fix by rewriting QML alone. That tracks with everything I found earlier: MuseScore's own 4.x migration notes flag the legacy filePath property as broken post-MS3, and there's a recurring history of FileDialog-related crashes across MS4 releases and platforms.
84949502-da68-4702-a0a2-f263d2104bd6.dmp
MuseScore_260729_232909.log
In which versions of MuseScore Studio is this issue present?
4.7.4
Regression
I was unable to check
Operating system
Windows 11
Additional context
The plugin's file dialog works in MacOS.
Checklist
- This report follows the guidelines for reporting bugs and issues
- I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
- I have attached all requested files and information to this report
- I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible
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First steps
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Assessment
This issue has not been assessed yet.