Lilypondfile: does not seem to work

[stefankaegi]

Hi everybody

I'm kind of lost. I'm writing a document with latex and then tried at
some point to integrate a lilypond file with:

\lilypondfile {/path/to/file/filename.ly}

It didn't work. There always came the following error:


! Undefined control sequence.
l.18 \lilypondfile
                   {/path/to/file/filename.ly}
? 


Maybe I had to load a package in latex? But I wouldn't no which one.
At all there isn't a lilypond file in the output.

Thanks a lot for your help
Cheers