Help with .write('musicxml.png')

[Áron Boros]

I'm using music21 on macOS with MuseScore 4.  

This code works fine: 

score.write('musicxml', fp='file.musicxml)
score.show('musicxml')

But this code does not:

score.write('musicxml.png', fp='file.png)

score.show('musicxml.png')

It generates:

PermissionError: [Errno 13] Permission denied: '/Applications/MuseScore 4.app'

Any thoughts on what I can try to clear up this permission problem?  Is there something different about which directories it's looking at for the png sub-format?  

Thanks in advance!

[Michael Scott Cuthbert]

MuseScore 4 seems to require the path to be /Applications/MuseScore 4.app/Contents/MacOS/mscore — you’ll need to change this in your UserSettings musescoreDirectPNGPath at least until a fix can be deployed in v9 (delayed more)

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[Áron Boros]

Brilliant, thank you!