Hi Minolo, thanks for the reply...in ROS what I know is that to invoke the nodes use action servers. Make one action client which can call action servers one by one to invoke node's functionality. http://www.ros.org/wiki/actionlib_tutorials/Tutorials provides help how to make actions. regards, safda -- View this message in context: http://ros-users.122217.n3.nabble.com/how-to-run-a-node-from-another-node-tp2439377p2510207.html Sent from the ROS-Users mailing list archive at Nabble.com.