Latex-book

[Stephen Carter]

I just installed 2.80.  Very impressed with the improvements, but now I get the
following when I try to run lilypond-book:

Traceback (most recent call last):
  File "/usr/local/lilypond/usr/bin/lilypond-book", line 1762, in ?
    main ()
  File "/usr/local/lilypond/usr/bin/lilypond-book", line 1716, in main
    chunks = do_file (file)
  File "/usr/local/lilypond/usr/bin/lilypond-book", line 1611, in do_file
    set_default_options (source)
  File "/usr/local/lilypond/usr/bin/lilypond-book", line 759, in 
set_default_options
    textwidth = get_latex_textwidth (source)
  File "/usr/local/lilypond/usr/bin/lilypond-book", line 1405, in
get_latex_textwidth
    preamble = source[:m.start (0)]
AttributeError: 'NoneType' object has no attribute 'start'