Hi, I've tried the pi_tracker package. I have no errors running skeleton.launch and tracker.launch. However, when I rosrun rviz, I met the following errors
[ERROR] [1316763642.701371303]: TF_NO_FRAME_ID: Ignoring transform with child_frame_id "/right_shoulder" from authority "/skeleton_tracker" because frame_id not set
[ERROR] [1316763642.701422097]: TF_NO_FRAME_ID: Ignoring transform with child_frame_id "/right_elbow" from authority "/skeleton_tracker" because frame_id not set
[ERROR] [1316763642.701475147]: TF_NO_FRAME_ID: Ignoring transform with child_frame_id "/right_hand" from authority "/skeleton_tracker" because frame_id not set
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