Running convert-ly on Windows10
1. add lilypond python to the path i. Open System Properties or you may need to open the old control panel ii. Click Advanced system settings. iii. Click Environment Variables... iv. Select PATH in the System variables section v. Click Edit vi. Add Python's path to the end of the list (the paths are separated by semicolons). ;C:\Program Files (x86)\Lilypond\usr\bin\python.exe 2. At a system command admin prompt i. associate .py files with python ii. type assoc .py=python 3. set the python.exe as the filetype for .py files i. type ftype .py="C:\Program Files (x86)\Lilypond\usr\bin\python.exe" "%1" 4. to run convert-ly.py put this (or similar) string in a .bat file i. forfiles /s /p "C:\Users\Peter\Lilypool\Music_Files\Prout" /M **.ly /c "cmd /c convert-ly.py -e @file" ii. this could be improved if the file is edited to ask for input, either a single file or a folder. Regards Peter