The autograder for the Topics quiz reports the following:
[17:16:14] [assess] Could not launch
topics_quiz package successfully. Let’s squash this bug before we proceed further.
The launch command exited earlier than expected. Things your can check:
- Did you name the launch file correctly? It should be
ros2 launch topics_quiz topics_quiz.launch.py and fix any errors that appears. (mark: 3.0)
My launch file is called
topics_quiz.launch.py as required by the instructions, not
topics_quiz.launch as stated in the above bullet point.
When I run
ros2 launch topics_quiz topics_quiz.launch.py as stated in the second bullet point, I do NOT get an error and the robot successfully executes the assignment.
How to I move forward from this situation ?
Hi @versavel, welcome to our community!
Thank you for bringing this to our attention. The first bullet point must be a typo, since
.launch extensions don’t exist in ROS 2, only
.launch.xml. We will update the instructions.
As for the autograder, do you still get marked as incorrect even if you run
ros2 launch topics_quiz topics_quiz.launch.py?
Please try again now.
I apologize for the trouble, but the way the
gradebot was checking that point was not working consistently for some reason. I’ve adjusted it to check in a more predictable way.
The launch file name mentioned in the first bullet point has also been corrected.
[09:02:19][assess] Gradebot graded the Topics quiz correctly (mark: 10.0)
Thank you !
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