Hi Ming,
yming tsang wrote > I got the error message when I run frecobaldi. I just installed Frescobaldi 3.1 on Win10. When launching for the first time, I had the same error message. Maybe I should have de-installed Frescobaldi 3.0 before? So I de-installed Frescobaldi 3.1 and just re-installed it again. Now it works. Does that help? Cheers, Klaus -- Sent from: http://lilypond.1069038.n5.nabble.com/User-f3.html