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I think probably your ROS_IP/ROS_HOSTNAME/ROS_MASTER_URI are not correctly set on the turtlebot for multi-device-pc communication. Some information on the roswiki and the turtlebot wiki.

The 'dumb' error message unfortunately is a late hydro regression I have yet to fix - it used to actually provide a hint to make sure you have your ROS_IP/ROS_HOSTNAME set.