Ros2 Basics in 5 days Humble(Python) Service Interface Problem

Course Support ROS Basics In 5 Days (Python)
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1

I created a services_quiz_sv for interfaces and when i first time colcon build it worked. When i tried again i get an error like this

image
image1309×184 13.8 KB

If i tried to use allow-overriding i get an error like this.
image
image1316×193 13 KB

I think because of this the quiz bot also cant colcon build it and even if my code works correctly i dont get the point how can i solve this.
But interface show command works correctly as shown below:
image

2

Hi, welcome to the community!

The first screenshot shows only a warning. Compilation can still succeed with warnings.

This can probably be solved by removing the build and install folders and compiling again:

cd ~/ros2_ws
rm -rf build/ install/
colcon build
3

Thank you removing build and install solved the problem