Hi, I managed to use lilypond in single lyx documents in LyX 2.0.0beta4 and 2.0 r1. Now, when I use those files containing lilypond code as children in a master document (lilypond module is selected in the master document settings), I get the following error:
" LaTeX Error: Environment lilypond undefined. Undefined control sequence. LaTeX Error: \begin{document} ended by \end{lilypond}. LaTeX Error: Environment lilypond undefined. Undefined control sequence. " I tried using \begin{lilypond} and \end{lilypond} as ERT in the master document and got the folowwing error message: "An error occurred while running: lilypond-book --safe --pdf --latex -program=pdflatex --lily-output-dir=ly-pdf" Any idea what I should do to be able to use lilypond in children lyx documents ? Thank you, Sylvain