> Thank you Jean for pointing me to those instructions. They are very > clear. I followed them to the letter. I used plain cmd -- even in > admin mode -- and edited the path to where my LilyPond 'bin' is > located. I closed/re-opened cmd. I even restarted the computer. I > still get the same message that lilypond-book is not recognized. I > even tried using the long version: > > python C:\Users\me\lilypond-2.25.8\bin\lilypond-book.py myfile.ly > > ...edited for my installation, of course, and got: > > 'H:python' is not recognized as an internal or external command, > operable program or batch file.
'H:python'? What's that? Is it possible that you have another Python installation on your computer? Can you actually execute C:\Users\me\lilypond-2.25.8\bin\python --help successfully? Irrespective of that it might be that the instructions in https://lilypond.org/doc/v2.25/Documentation/usage/command_002dline-preliminaries.html for `convert-ly` (these instructions are essentially the same as for `lilypond-book`) are not completely accurate. While I tried to check this on a Windows computer, I'm not a real Windows user at all, and it is possible that I missed or misrepresented some details. In particular, I didn't cover the situation of two different Python installations in parallel – maybe there are conflicts. Werner
