ServiceQuiz ERROR :

Course Support ROS Basics In 5 Days (Python)
1

i think i m realy close to finishing service quiz but i keep getting this massage in the web shell

ROS_MASTER_URI=http://1_simulation:11311

ERROR: cannot launch node of type [services_quiz/bb8_move_custom_service_server.py]: services_quiz
ROS path [0]=/opt/ros/noetic/share/ros
ROS path [1]=/home/user/catkin_ws/src
ROS path [2]=/home/simulations/public_sim_ws/src
ROS path [3]=/opt/ros/noetic/share
No processes to monitor
shutting down processing monitor…
… shutting down processing monitor complete
user:~/catkin_ws$

can someone give me a hint why it s this happening

2

Hi,

That looks like ROS is not finding the services_quiz package.

Have you compiled your worspace and sourced it?

cd ~/catkin_ws
catkin_make
source devel/setup.bash
rospack profile
3

In addition, please ensure your python file has executable permissions:

chmod +x your_python_file.py

Also, ensure that your launch file is correctly written as shown in the examples.