John, I doubt anyone is going to be able to help you with so little information. All that is saying is that your ROS node seg faulted somewhere, which is pretty much impossible to debug. Some guidelines on how to help the list help you: http://www.ros.org/wiki/Support#Guidelines_for_mailing_list_messages Could you try launching the node with gdb (some info here: http://www.ros.org/wiki/roslaunch/Tutorials/Roslaunch%20Nodes%20in%20Valgrind%20or%20GDB) to get a backtrace? Can you post the launch files and parameters that are causing the crash? - Eric On Wed, Sep 22, 2010 at 6:39 PM, John Browning wrote: > > hey it worked but now a new problem whats this mean > > /opt/ros/cturtle/ros/bin/rosrun: line 35: 1792 Segmentation fault > $exepath "$@" > -- > View this message in context: > http://ros-users.122217.n3.nabble.com/Sick-LMS200-display-wrong-in-rviz-tp1561531p1564430.html > Sent from the ROS-Users mailing list archive at Nabble.com. > _______________________________________________ > ros-users mailing list > ros-users@code.ros.org > https://code.ros.org/mailman/listinfo/ros-users >