the set_command service failed when running the node tracker_base_controller in the package "pi_tracker" [closed]
At first,I run "roslaunch pi_tracker skeleton.launch" on the command line.And then the topic "/skeleton" came out.So I run "rosrun pi_tracker tracker_base_controller.py" on the command line.And then the the topic "/cmd_vel" came out.But the messages on the topic "/cmd_vel" is always like this: linear: x: 0.0 y: 0.0 z: 0.0 angular: x: 0.0 y: 0.0 z: 0.0
So I call the service "set_command",and then the window running the node "tracker_base_controller" shows as below:
"Traceback (most recent call last): File "/home/sven/ros_workspace/pi_tracker/bin/tracker_base_controller.py", line 254, in <module> TrackerBaseController() File "/home/sven/ros_workspace/pi_tracker/bin/tracker_base_controller.py", line 82, in __init__ if self.tracker_command == 'STOP' or (self.skeleton['confidence']['left_hand'] < 0.5 and self.skeleton['confidence']['right_hand'] < 0.5): KeyError: 'left_hand' [INFO] [WallTime: 1338390962.048561] Shutting down Tracker Base Controller Node." Obviously,the node "tracker_base_controler" stopped running. Is there any one who can help me?
