Dear sir, I have done the same steps as given by you, after running the sample.launch file i am getting this started roslaunch server http://abhishek-Lenovo-ideapad-Y700-15ISK:36730/

SUMMARY

PARAMETERS * /rosdistro: indigo * /rosversion: 1.11.21 * /vrpn_client_node/broadcast_tf: True * /vrpn_client_node/frame_id: world * /vrpn_client_node/port: 3883 * /vrpn_client_node/refresh_tracker_frequency: 1.0 * /vrpn_client_node/server: localhost * /vrpn_client_node/update_frequency: 100.0 * /vrpn_client_node/use_server_time: False

NODES / vrpn_client_node (vrpn_client_ros/vrpn_client_node)

auto-starting new master process[master]: started with pid [17028] ROS_MASTER_URI=http://localhost:11311

setting /run_id to 44680bdc-4ea2-11e7-869a-c85b768ff82e process[rosout-1]: started with pid [17041] started core service [/rosout] process[vrpn_client_node-2]: started with pid [17045] and after running the rostopic lsit command (on another terminal) i am getting this /rosout /rosout_agg should i change the launch file, if yes then tell me how to modify the launch file and what to modify Please resolve the issue Regards, abhishek