Submitter:
Long desciption: Describe as exactly as you can what you did when this error occurred. If you give no description at all, you make it very difficult to track down this bug. You should replace this text with your description, and also remove the "bug-tag" in the bottom of this text so that this bug is not automatically sorted among the bug reports with no description. (bug-tag: NO_DESCRIPTION)

Solfege version	3.16.0
Bzr revision info	branch_nick: build-branch revno: 1546 revision_id: tca@gnu.org-20100330211659-qrtp6fhv29p169uf clean: False
gtk.pygtk_version	(2, 12, 1)
gtk	<module 'gtk' from 'C:\Program Files\GNU Solfege\python\lib\site-packages\gtk-2.0\gtk\__init__.py'>
sys.version_info	(2, 6, 4, 'final', 0)
sys.version	2.6.4 (r264:75708, Oct 26 2009, 08:23:19) [MSC v.1500 32 bit (Intel)]
sys.prefix	C:\Program Files\GNU Solfege\python
sys.platform	win32
windowsversion	(6, 1, 7600, 2, '')

Message from stderr:

Traceback (most recent call last):
  File "C:\Program Files\GNU Solfege\share\solfege\solfege\mainwin.py", line 397, in on_page_link_clicked
    self.display_data(link)
  File "C:\Program Files\GNU Solfege\share\solfege\solfege\mainwin.py", line 455, in display_data
    show_topics)
  File "C:\Program Files\GNU Solfege\share\solfege\solfege\mainwin.py", line 349, in _display_data
    labeltxt = lessonfile.infocache.get(link, 'title')
  File "C:\Program Files\GNU Solfege\share\solfege\solfege\lessonfile.py", line 1677, in get
    assert is_uri(filename) or os.path.isabs(filename)
AssertionError
Traceback (most recent call last):
  File "C:\Program Files\GNU Solfege\share\solfege\solfege\mainwin.py", line 397, in on_page_link_clicked
    self.display_data(link)
  File "C:\Program Files\GNU Solfege\share\solfege\solfege\mainwin.py", line 455, in display_data
    show_topics)
  File "C:\Program Files\GNU Solfege\share\solfege\solfege\mainwin.py", line 349, in _display_data
    labeltxt = lessonfile.infocache.get(link, 'title')
  File "C:\Program Files\GNU Solfege\share\solfege\solfege\lessonfile.py", line 1677, in get
    assert is_uri(filename) or os.path.isabs(filename)
AssertionError