Here show me a WARN.
[1595012608.388183, 1122.683000]: The ‘use_gui’ parameter was specified, which is deprecated. We’ll attempt to find and run the GUI, but if this fails you shouldinstall the ‘joint_state_publisher_gui’ package instead and run that. This backwards compatibility option will be removed in Noetic.
and there’re not the RobotModelon the Second window.So something wrong i did? How could I deal with that
Those warning messages are common as new versions of ROS get released. As long as it doesnt break your code, it’s just a warning 