'musicxml2ly' failure

[Lee T . Wilkirson]

I just installed LilyPond 2.8.5 on Macintosh OS X 10.4.6.

I executed the 'musicxml2ly' converter to attempt conversion of the
(admittedly rather large) MusicXML file available for download at
<http://www.gutenberg.org/etext/5634>.

After an extended time, the following output was displayed:
- Reading MusicXML...
- Converting to LilyPond expressions...
- Converting to LilyPond expressions...
- Converting to LilyPond expressions...
- Traceback (most recent call last):
-   File "LilyPond.app/Contents/Resources/bin/musicxml2ly",
-   line 535, in ?
-     main()
-   File "LilyPond.app/Contents/Resources/bin/musicxml2ly",
-   line 532, in main
-     voices = convert (args[0], options.output)
-   File "LilyPond.app/Contents/Resources/bin/musicxml2ly",
-   line 499, in convert
-     voices = get_all_voices (parts)
-   File "LilyPond.app/Contents/Resources/bin/musicxml2ly",
-   line 377, in get_all_voices
-     part_ly_voices[n] = (musicxml_voice_to_lily_voice (v),v)
-   File "LilyPond.app/Contents/Resources/bin/musicxml2ly",
-   line 284, in musicxml_voice_to_lily_voice
-     notations = n.get_maybe_exist_typed_child (musicxml.Notations)
-   File "LilyPond.app/Contents/Resources/share/lilypond/current/
-   python/musicxml.py", 
-   line 60, in get_maybe_exist_typed_child
-     raise "More than 1 child", klass
- More than 1 child: musicxml.Notations

No LilyPond output file was created.