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I made a TVP file at home in TVP 10.5.7 STD and tried to open it in my animation course to show it to my professor. But it won't open.
The computer was a Windows PC, with TVP 10 Pro (I forgot to look up, which exact version, but I guess it wasn't 10.5 or above, since nobody seems to update TVPaint regularly)
Now there are many factors:
OSX and Windows
Standard and Pro
10.5.7 and 10 something.
But I expected none of them as a problem. Or did I miss something?

There was a similar bug in older TVPaint 10 versions, between Pro and Standard. Update both editions and everything should work

Ok nice to know it's just an incompatibility between 10.5 and 10 something and not between Pro and Standard or OSX and Windows. I will ask the profs to update all versions.
Thank you Elodie.

You are welcome. If the problem still occurs, please let us know