conversion finale vers lilypond

[christophe]

bonjour,
j'essaye de transformer un fichier provenant de finale pour le modifier avec Lilypond. je passe d'abord par un format musicxml.
voici la ligne de commande et l'erreur :

C:\Users\christophe\Documents>musicxml2ly KV421.xml
Reading MusicXML from KV421.xml ...
Traceback (most recent call last):
  File "C:\Program Files (x86)\LilyPond\usr\bin\musicxml2ly.py", line 2955, in ?

    main()
  File "C:\Program Files (x86)\LilyPond\usr\bin\musicxml2ly.py", line 2950, in m
ain
    voices = convert (filename, options)
  File "C:\Program Files (x86)\LilyPond\usr\bin\musicxml2ly.py", line 2855, in c
onvert
    tree = read_musicxml (filename, options.compressed, options.use_lxml)
  File "C:\Program Files (x86)\LilyPond\usr\bin\musicxml2ly.py", line 2846, in r
ead_musicxml
    return read_xml (io_object, use_lxml)
  File "C:\Program Files (x86)\LilyPond\usr\bin\musicxml2ly.py", line 2808, in r
ead_xml
    doc = minidom.parse(io_object)
  File "C:\Program Files (x86)\LilyPond\usr\lib\python2.4\xml\dom\minidom.py", l
ine 1915, in parse
    return expatbuilder.parse(file)
  File "C:\Program Files (x86)\LilyPond\usr\lib\python2.4\xml\dom\expatbuilder.p
y", line 924, in parse
    result = builder.parseFile(fp)
  File "C:\Program Files (x86)\LilyPond\usr\lib\python2.4\xml\dom\expatbuilder.p
y", line 211, in parseFile
    parser.Parse("", True)
xml.parsers.expat.ExpatError: unclosed token: line 3901, column 19


C:\Users\christophe\Documents>musicxml2ly --version
musicxml2ly.py (LilyPond) 2.12.2

je suis sous vista x64


Avez-vous déjà rencontré ce type de problème ?

Merci pour  votre aide à tous

Christophe