If Odin hangs on "rqt_close" or "Close Serial Port," it often indicates a communication failure during the final handshake, which can be caused by faulty USB cables or drivers. Common Causes for "rqt_close" Hanging
Note: Since odin rqtclose is not a widely documented public command, always check your specific ROS distribution and the Odin project’s documentation for exact usage. odin rqtclose