problem with lilypond-book (with TeX Live on Win 7 (x64))

[der_jo]

> I'm not top posting.

I've just installed Lilypond 2.16.2 but I can't get lilypond-book working
(I'm working with TeX Live on Win 7 x64). 

lilypond-book --output=out test.tex 

where test.tex is:

\documentclass{article}
\begin{document}
\begin{lilypond}
\score { \notes \relative c' {
c2 g'2 \times 2/3 { f8 e d } c'2 g4
} }
\end{lilypond}
\end{document}

always ends up with 

C:\Users\[...]>lilypond-book --output=out test.tex
lilypond-book.py (GNU LilyPond) 2.16.2
Reading test.tex...
Running `latex' on file `c:\users\[...]\appdata\local\temp\[...].tex' to
detect default page settings.

after interrupting I always get

Traceback (most recent call last):
  File "C:\Program Files (x86)\LilyPond\usr\bin\lilypond-book.py", line 766,
in ?
    main ()
  File "C:\Program Files (x86)\LilyPond\usr\bin\lilypond-book.py", line 749,
in main
    chunks = do_file (files[0])
  File "C:\Program Files (x86)\LilyPond\usr\bin\lilypond-book.py", line 597,
in do_file
    global_options.formatter.init_default_snippet_options (source)
  File "C:\Program Files
(x86)\LilyPond\usr\share\lilypond\current\python\book_base.py", line 141, in
init_default_snippet_options
    line_width = self.get_line_width (source)
  File "C:\Program Files
(x86)\LilyPond\usr\share\lilypond\current\python\book_latex.py", line 280,
in get_line_width
    textwidth = get_latex_textwidth (source, self.global_options)
  File "C:\Program Files
(x86)\LilyPond\usr\share\lilypond\current\python\book_latex.py", line 206,
in get_latex_textwidth
    returncode = os.system(cmd)
KeyboardInterrupt

Thanks in advance!