A problem occurred while running a Python script. Here is the sequence of function calls leading up to the error, with the most recent (innermost) call first. The exception attributes are:
      __doc__ = 'Inappropriate argument value (of correct type).'
      __getitem__ = <bound method ValueError.__getitem__ of <exceptions.ValueError instance>>
      __init__ = <bound method ValueError.__init__ of <exceptions.ValueError instance>>
      __module__ = 'exceptions'
      __str__ = <bound method ValueError.__str__ of <exceptions.ValueError instance>>
      args = ('bad marshal data',)

/usr/lib/python2.4/site-packages/roundup/backends/sessions_dbm.py in get(self=<roundup.backends.sessions_dbm.Sessions instance>, infoid='last_clean', value='last_use', default=0)

   58         try:
   59             if db.has_key(infoid):

60                 values = marshal.loads(db[infoid])

      values = undefined, global marshal = <module 'marshal' (built-in)>, global loads = undefined, db = {}, infoid = 'last_clean'
   61             else:
   62                 if default != self._marker:

/usr/lib/python2.4/site-packages/roundup/cgi/client.py in clean_sessions(self=<roundup.cgi.client.Client instance>)

  309         """
  310         sessions = self.db.getSessionManager()

311         last_clean = sessions.get('last_clean', 'last_use', 0)

      last_clean = undefined, sessions = <roundup.backends.sessions_dbm.Sessions instance>, global get = undefined
  312 
  313         # time to clean?

/usr/lib/python2.4/site-packages/roundup/cgi/client.py in determine_user(self=<roundup.cgi.client.Client instance>)

  393 
  394         # make sure we have the session Class

395         self.clean_sessions()

      self = <roundup.cgi.client.Client instance>, global clean_sessions = undefined
  396         sessions = self.db.getSessionManager()
  397 

/usr/lib/python2.4/site-packages/roundup/cgi/client.py in inner_main(self=<roundup.cgi.client.Client instance>)

  227 
  228             # make sure we're identified (even anonymously)

229             self.determine_user()

      self = <roundup.cgi.client.Client instance>, global determine_user = undefined
  230 
  231             # figure out the context and desired content template