How to repair a MuseScore file with a "bad format" error
Occasionally you may try to open a MuseScore file, only to get an error message like the following:
Clicking on "Show details":
One possible reason for the error is the presence of one or more "&" (ampersand) characters in the source code. To correct:
- Right click on the file, select a "Rename" option, and change the file extension from .mscz to .zip (Note: your system should be set to display file extensions);
- Right click on the *.zip file and select an Unzip/Extract option from the menu; extract the file to a convenient location;
- Locate the *.mscx file inside the generated folder and open it with a text editor (e.g. Wordpad, Notepad++, Vim etc.).
Navigate through the lines of code until you come to the line and column error previously reported:
Any lone "&" (ampersand) character (e.g. see image above) should be replaced with its equivalent XML entity reference—i.e. "&";
- Save the corrected *.mscx file and open it with MuseScore.