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This is OK, especially for the demo. The run_proc_manager script is called by the run script, which is called by the launch file that you run in the demo. run_proc_manager creates a file at /tmp/autoware_proc_manager which keeps track of the processes that are launched by the Runtime Manager GUI. After this, the terminal from which you launched the runtime manager tries to connect to the file to output data on the terminal about which processes are being launched. The data are just informational so not connecting to that file is fine.