Hey, It doesn't seem to be possible to use with machine names. Is this intentional? Following from point #3 on this page < http://www.ros.org/wiki/roslaunch/Architecture>, I expected to be able to structure my launch file like so: The nodes listed inside of robot_stuff.launch and more_robot_stuff.launch would be able to refer to robot_machine and have that resolve to cpr-demo-01. Have I misunderstood the expected structure? Is the idea that the machine aliasing occurs in the file containing the master machines list? Thanks, Mike