ROS Basic in 5 Day: File service not found

How to solve this problem

image

Hi, can you give more info on the problem? What unit/exercise are you working on? A good idea when strange errors occur is to remove the /devel and /build folders:

cd catkin_ws/
rm -rf build/
rm -rf devel/
catkin_make

@mewqwert

You need to start the service first.