On Wed, Aug 25, 2010 at 15:12, shahmi wrote: > Hi, > > I've added the path, but it is still problematic. Any thoughts? Below is > the output from the terminal. > > Thanks in advance. > > shah@shah-laptop:~$ export ROS_PACKAGE_PATH=/opt/ros/cturtle/stacks > This is not sufficient. Add the path to the srl_people_tracker_0.2 to the ROS_PACKAGE_PATH ! If you are in the directory of the srl_people_tracker you can try for instance: e.g.export ROS_PACKAGE_PATH=$PWD:$ROS_PACKAGE_PATH I think you should first try to work to the ROS tutorials in more detail. Tinne