I get the following when running roswtf from my ROS_ROOT:

Beginning tests of your ROS graph. These may take awhile...
analyzing graph...
... done analyzing graph
running graph rules...
... done running graph rules
Traceback (most recent call last):
  File "/home/robot/ros/electric/ros_comm/utilities/roswtf/src/roswtf/__init__.py", line 226, in _roswtf_main
    p(ctx)
  File "/home/robot/ros/electric/geometry/tf/src/tf/tfwtf.py", line 165, in roswtf_plugin_online
    if not is_tf_active():
  File "/home/robot/ros/electric/geometry/tf/src/tf/tfwtf.py", line 152, in is_tf_active
    master = rosgraph.Master('/tfwtf')
AttributeError: 'module' object has no attribute 'Master'
'module' object has no attribute 'Master'

Aborting checks, partial results summary:

No errors or warnings

I am running a machine compiled from source and have recompiled tf and roswtf packages and have verified that the master is running.

Any suggestions?