Doula Exception

gistfile1.txt

Traceback (most recent call last):
  File "/opt/doula/lib/python2.6/site-packages/waitress/channel.py", line 329, in service
    task.service()
  File "/opt/doula/lib/python2.6/site-packages/waitress/task.py", line 173, in service
    self.execute()
  File "/opt/doula/lib/python2.6/site-packages/waitress/task.py", line 380, in execute
    app_iter = self.channel.server.application(env, start_response)
  File "/opt/doula/lib/python2.6/site-packages/pyramid/router.py", line 187, in __call__
    response = self.handle_request(request)
  File "/opt/doula/lib/python2.6/site-packages/pyramid/tweens.py", line 20, in excview_tween
    response = handler(request)
  File "/opt/doula/lib/python2.6/site-packages/pyramid/router.py", line 164, in handle_request
    response = view_callable(context, request)
  File "/opt/doula/lib/python2.6/site-packages/pyramid/config/views.py", line 333, in rendered_view
    result = view(context, request)
  File "/opt/doula/lib/python2.6/site-packages/pyramid/config/views.py", line 471, in _requestonly_view
    response = view(request)
  File "/opt/doula/src/doula/doula/views.py", line 27, in show_home
    return show_sites(request)
  File "/opt/doula/src/doula/doula/views.py", line 37, in show_sites
    return handle_exception(e, request)
  File "/opt/doula/src/doula/doula/views.py", line 250, in handle_exception
    return { 'msg': e.message, 'stacktrace': tb, 'config': Config }
NameError: global name 'tb' is not defined