Lilypond-book help need!

[Marcos Press]

I'm not sure what is happening...

LaTeX does not know any lilypond package.

Lilypond-book gives these error always:

####
~$ lilypond-book --pdf --output=out file.lytex

[...]

File "/usr/lib/python2.7/re.py", line 242, in _compile
    raise error, v # invalid _expression_
sre_constants.error: bad character range

####

and nothing else happends.

I can submit any info you ask for.

Thanks.

Marcos.