Filename problem when generating a compressed MusicXML file
Observed on MuseScore 5.6.2.x
When we ask MuseScore to generate a compressed MusicXML file (*.MXL), if the MXL filename (whether inherited from the filename of the source score or entered or edited by the user) contains an "&", the MXL file (although cheerfully created) is misformed, and cannot be opened by MuseScore, Overture, or other MusicXML-aware programs.
That character should be valid under the norms for filenames in Windows or MacOS.
This is hardly a big or widespread problem. But I thought I would report it.