robot_upstart uninstall, Job not found, nothing to remove

edit

Hi, All I tried to remove the auto start launch file which locates at ~/catkin_ws/src/roscopter/nodes/upstart.launch After system boot up, "rostopic list" gives a list of topics, which shows the launch file was excecuted.

I used following command to uninstall it

rosrun robot_upstart uninstall roscopter/nodes/upstart.launch

It returns

/lib/systemd/systemd
Job not found, nothing to remove

I tried

rosrun robot_upstart install roscopter/nodes/upstart.launch

it works.

I am confused and have no idea of what's the next step, anyone has ideas?