Lilypond-book does not run

[Chris]

I have used Lilypond-book (2.14) with Vista. Now I switched to Windows 8 and 
installed the actual stable lilypond Version (2.16). An actual MikTeX 
Installation did run (pdfLaTeX works).
Lilypond.exe runs well, lilypond-book does not run correctly.

To have a simple test I used the example of the documentation 
(http://lilypond.org/doc/v2.16.1/Documentation/usage/an-example-of-a-
musicological-document.html) and deleted the line with \lilypondfile


Starting a cmd and entering the suggested command 
"C:\Program Files\LilyPond\usr\bin\lilypond-book.py"  --output=out --pdf 
lilybook.lytex

I get the help. 
Starting with --verbose I get an Exeption in line 114

Is there a incompabiliy with Windows 8? Do I have an error in the command?

Thanks!

Chris