Hi Peter, Occasionally, I've had similar problems with Windows 10 in the past. What saved me was the possibility to choose between several versions of LilyPond.
Default Windows path (as I've seen it in your postings) C:\Program Files (x86)\LilyPond\usr\bin\lilypond.exe As each LilyPond version has its own set of executables, includes, even fonts, I always insert Lily's version number into the path during the LilyPond installation process. That way, different LilyPond versions can peacefully co-exist and be used in parallel without any interference. Example for 2.19.81 C:\Program Files (x86)\LilyPond\2.19.81\usr\bin\lilypond.exe Example for 2.18.2 C:\Program Files (x86)\LilyPond\2.18.2\usr\bin\lilypond.exe These versions/paths have to be specified in Frescobaldi via Edit -> Preferences ... -> LilyPond Preferences in the "LilyPond versions to use" block. You can even use Frescobaldi's option "Automatically choose LilyPond version from document". This may not eliminate the cause, but it saved my a... several times when specific LilyPond versions played havoc in Windows. Good luck Torsten -- Sent from: http://lilypond.1069038.n5.nabble.com/User-f3.html _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user