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  • Q: When launching, you get:
    "Pyro4.errors.CommunicationError: cannot connect to (u'192.168.178.12', 41544): [Errno 111] Connection refused"

    => You need to start the roslaunch2_server instance on the remote host first.

  • Q: After launching roslaunch2_server on a host, you get:
    error: cannot find a running PyRO name server, please start it with:
    $ python -m Pyro4.naming -n $(hostname -I | grep -o '^\S*')

    => As the output implies, PyRO requires a name server to be started (only) ONCE on any host inside your subnet. You can simply copy-paste-run the above command to do so. Alternatively, you can setup an upstart/systemd script, see docs in roslaunch2/config/{systemd,upstart}/