Folks, I'm trying to get the Navigation Stack working for a homegrown robotic platform and have setup the stack as described in the robot setup tutorial. To test the stack/setup I am using the Sending Simple Navigation Goals tutorial. Navigation stack, as well as the simple_navigation_goals node are launched as described in these tutorials. Now here's the issue: though, /move_base node is created, it seems that the action server is not created, and hence simple_navigation_goals spins on. //wait for the action server to come up 14 while(!ac.waitForServer(ros::Duration(5.0))){ 15 ROS_INFO("Waiting for the move_base action server to come up"); 16 } In addition to launching the move_base node, is there anything else that needs to be done to create the action server.. Thanks Joseph [1] http://www.ros.org/wiki/navigation/Tutorials/RobotSetup [2] http://www.ros.org/wiki/navigation/Tutorials/SendingSimpleGoals