Roslaunch is not happening

Course Support ROS Basics In 5 Days (Python)
1

unable to do roslaunch and i dont understand the reason it says no module found

2

Hi @saitarak.padarthi,

Welcome to the Community! Could you please tell us which course, unit and exercise are you trying to do?

3

Dear Sir,

I’m doing ROS basics in 5 days. The problem is wherever I create own message. This problem is coming. I have created service message and also topic message. Same issue has come even after compiling and also did source devel/setup.bash this. So can you shed a light on how to proceed further.

4

Could you please share a screenshot of what you are seeing? You could also copy and paste here the output of the shell from where you started the roslaunch to where the error occurred.

5

Dear Sir,

process[service_services_quiz_server-1]: started with pid [1184]
Traceback (most recent call last):
File “/home/user/catkin_ws/src/services_quiz/bb8_move_custom_service_server.py”, line 4, in
from services_quiz.srv import BB8CustomServiceMessage, BB8CustomServiceMessageResponse
ModuleNotFoundError: No module named ‘services_quiz’
[service_services_quiz_server-1] process has died [pid 1184, exit code 1, cmd /home/user/catkin_ws/src/services_quiz/bb8_move_custom_service_server.py __name:=service_services_quiz_server __log:=/home/user/.ros/log/9939e4ea-6c40-11eb-b562-0242c0a8d007/service_services_quiz_server-1.log].
log file: /home/user/.ros/log/9939e4ea-6c40-11eb-b562-0242c0a8d007/service_services_quiz_server-1*.log
all processes on machine have died, roslaunch will exit
shutting down processing monitor…
… shutting down processing monitor complete
done

This is the error it is showing for every task i do with own message creation.

6

This is the key to the error. Do you have a package named services_quiz with the exact spelling? If so, this package was not properly created and/or compiled. Please ensure that:

  • you have created this package in ~/catkin_ws/src/.
  • catkin_make run successfully and detects this package.