Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 356, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 218, in dispatch
    raise early_error[0], early_error[1], early_error[2]
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 191, in dispatch
    req.session = Session(self.env, req)
  File "/usr/lib/python2.4/site-packages/trac/web/session.py", line 53, in __init__
    self.get_session(req.authname, authenticated=True)
  File "/usr/lib/python2.4/site-packages/trac/web/session.py", line 72, in get_session
    (sid, int(authenticated)))
  File "/usr/lib/python2.4/site-packages/trac/db/util.py", line 47, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
  File "/usr/lib/python2.4/site-packages/trac/db/sqlite_backend.py", line 56, in execute
    args or [])
  File "/usr/lib/python2.4/site-packages/trac/db/sqlite_backend.py", line 48, in _rollback_on_error
    return function(self, *args, **kwargs)
ProgrammingError: Cannot operate on a closed database.