"roslaunch pi_tracker tracker.launch" - Can't find node

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... logging to /home/geniusgeeko/.ros/log/eac7f5c6-4ff0-11e0-a4d0-904ce572720a/roslaunch-GG-Linux-Machine-2253.log Checking log directory for disk usage. This may take awhile. Press Ctrl-C to interrupt Done checking log file disk usage. Usage is <1GB. started roslaunch server http://GG-Linux-Machine:38241/ SUMMARY ======== PARAMETERS * /tracker_command/skel_to_joint_map/left_foot * /tracker_base_controller/skel_to_joint_map/left_knee * /tracker_joint_controller/max_rotation_speed * /tracker_command/skel_to_joint_map/right_knee * /tracker_joint_controller/skel_to_joint_map/right_shoulder * /tracker_joint_controller/reverse_rotation * /tracker_base_controller/skel_to_joint_map/left_foot * /tracker_base_controller/scale_drive_speed * /tracker_base_controller/holonomic * /tracker_joint_controller/skel_to_joint_map/neck * /tracker_joint_controller/holonomic * /tracker_command/default_joint_speed * /tracker_joint_controller/joint_controller_rate * /tracker_base_controller/scale_rotation_speed * /tracker_base_controller/skel_to_joint_map/left_shoulder * /tracker_joint_controller/fixed_frame * /tracker_joint_controller/skel_to_joint_map/left_shoulder * /tracker_joint_controller/skel_to_joint_map/torso * /tracker_base_controller/skel_to_joint_map/right_hip * /tracker_base_controller/skel_to_joint_map/right_hand * /tracker_command/skel_to_joint_map/torso * /tracker_joint_controller/command_rate * /tracker_command/skel_to_joint_map/left_elbow * /robotis_joint_controller/baud * /tracker_base_controller/skel_to_joint_map/neck * /tracker_command/skel_to_joint_map/right_foot * /tracker_command/max_drive_speed * /tracker_base_controller/skel_to_joint_map/torso * /tracker_command/scale_drive_speed * /tracker_base_controller/max_drive_speed * /tracker_command/base_controller_rate * /tracker_base_controller/skel_to_joint_map/right_shoulder * /tracker_base_controller/skel_to_joint_map/left_hip * /tracker_command/skel_to_joint_map/right_hand * /robotis_joint_controller/rate * /tracker_base_controller/skel_to_joint_map/right_foot * /tracker_base_controller/skel_to_joint_map/right_elbow * /tracker_joint_controller/skel_to_joint_map/left_knee * /tracker_base_controller/use_real_robot * /tracker_command/reverse_rotation * /tracker_joint_controller/scale_rotation_speed * /tracker_base_controller/base_controller_rate * /tracker_base_controller/tracking_rate * /tracker_base_controller/skel_to_joint_map/left_elbow * /tracker_joint_controller/skel_to_joint_map/head * /tracker_joint_controller/max_drive_speed * /tracker_command/skel_to_joint_map/head * /tracker_command/fixed_frame * /tracker_base_controller/skel_to_joint_map/left_hand * /tracker_joint_controller/skel_to_joint_map/right_hip * /tracker_command/tracking_rate * /tracker_command/skel_to_joint_map/right_shoulder * /tracker_base_controller/reverse_rotation * /tracker_command/command_rate * /tracker_base_controller/default_joint_speed * /tracker_command/skel_to_joint_map/left_shoulder * /tracker_base_controller/base_control_side * /tracker_joint_controller/skel_to_joint_map/right_elbow * /tracker_joint_controller/default_joint_speed * /tracker_joint_controller/skel_to_joint_map/right_knee * /tracker_command/use_real_robot * /tracker_joint_controller/skel_to_joint_map/left_elbow * /tracker_command/skel_to_joint_map/left_hip * /tracker_joint_controller/use_real_robot * /tracker_command/joint_controller_rate * /tracker_base_controller/command_rate * /tracker_command/skel_to_joint_map/right_hip * /tracker_base_controller/skel_to_joint_map/head * /tracker_command/skel_to_joint_map/neck * /tracker_base_controller/fixed_frame * /tracker_command/skel_to_joint_map/left_knee * /tracker_joint_controller/base_controller_rate * /tracker_command/max_rotation_speed * /tracker_command/holonomic * /tracker_joint_controller/skel_to_joint_map/right_hand * /tracker_command/skel_to_joint_map/right_elbow * /robotis_joint_controller/port * /tracker_joint_controller/skel_to_joint_map/left_hip * /tracker_command/scale_rotation_speed * /tracker_command/base_control_side * /tracker_joint_controller/base_control_side * /tracker_base_controller/joint_controller_rate * /tracker_command/skel_to_joint_map/left_hand * /tracker_base_controller/skel_to_joint_map/right_knee * /tracker_joint_controller/skel_to_joint_map/right_foot * /tracker_joint_controller/skel_to_joint_map/left_foot * /tracker_base_controller/max_rotation_speed * /tracker_joint_controller/scale_drive_speed * /tracker_joint_controller/tracking_rate * /tracker_joint_controller/skel_to_joint_map/left_hand NODES / tracker_command (pi_tracker/tracker_command.py) tracker_base_controller (pi_tracker/tracker_base_controller.py) tracker_joint_controller (pi_tracker/tracker_joint_controller.py) robotis_joint_controller (pi_tracker/robotis_joint_controller.py) ROS_MASTER_URI=http://GG-Linux-Machine:11311/ core service [/rosout] found process[tracker_command-1]: started with pid [2274] process[tracker_base_controller-2]: started with pid [2275] ERROR: cannot launch node of type [pi_tracker/tracker_joint_controller.py]: Cannot locate node of type [tracker_joint_controller.py] in package [pi_tracker]

tracker_join_controller.py is clearly in the bin of the package also.