Traceback (most recent call last):
  File "/usr/local/lib/python2.5/site-packages/CherryPy-3.0.1-py2.5.egg/cherrypy/_cprequest.py", line 551, in respond
    cherrypy.response.body = self.handler()
  File "/usr/local/lib/python2.5/site-packages/CherryPy-3.0.1-py2.5.egg/cherrypy/_cpdispatch.py", line 24, in __call__
    return self.callable(*self.args, **self.kwargs)
  File "/usr/local/lib/python2.5/site-packages/fab-2.1.5-py2.5.egg/fab/page.py", line 274, in index
    return self._handleReq(args, kwargs)
  File "/usr/local/lib/python2.5/site-packages/fab-2.1.5-py2.5.egg/fab/page.py", line 260, in _handleReq
    result = self._doControl(args, kwargs)
  File "/usr/local/lib/python2.5/site-packages/fab-2.1.5-py2.5.egg/fab/page.py", line 213, in _doControl
    result = _useMagicVars(self.control,(page,), paths, args)
  File "/usr/local/lib/python2.5/site-packages/fab-2.1.5-py2.5.egg/fab/page.py", line 79, in _useMagicVars
    result = f(*callArgs, **callKws)
  File "/home/cmw/svn/g2b10wc/control/ivw/main.py", line 148, in control
    session, data = self.authenticate(kwargs)
  File "/home/cmw/svn/g2b10wc/control/ivw/main.py", line 37, in authenticate
    session.visa = visa
  File "/usr/local/lib/python2.5/site-packages/fab-2.1.5-py2.5.egg/fab/sessions.py", line 16, in __setattr__
    cherrypy.session[k] = v
  File "/usr/local/lib/python2.5/site-packages/CherryPy-3.0.1-py2.5.egg/cherrypy/__init__.py", line 260, in __setitem__
    child = getattr(serving, self.__attrname__)
AttributeError: '_Serving' object has no attribute 'session'