Problem using lilypond-book (2.16.1) on Windows 7

[Per Sennels]

Using lilypond-book does not generate any output, only the help info.
When using 
lilypond-book --verbose
I get the same help info, but also the following:
Traceback (most recent call first):
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 689, in main files = do_options ()
File "C:\Program Files (x86)\LilyPond\usr\bin\lilypond-book.py", 
  line 681, in do_options exit (2)
File "C:\Program Files (x86)\LilyPond\usr\bin\lilypond-book.py", 
  line 114, in exit raise Exception (_ ('Exiting (%d)...') % i)
Exception: Exiting (2)...