Error in example 4.5 of ROS2 in 5 days (Python)

Course Support ROS2 In 5 Days Python
1

Hi, in example 4.5 of ROS2 in 5 days (Python), when I run the command:

colcon build --packages-select custom_interfaces

I get the following error:

[0.303s] WARNING:colcon.colcon_core.package_selection:ignoring unknown package ‘custom_interfaces’ in --packages-select

Summary: 0 packages finished [0.19s]

May I know what is wrong? Thank you.

2

This probably means that colcon is not finding your package. Have you created it? You might have misspelled the one you created.

3

There was an error in the example given by The Construct. The error is in the package.xml file.
It should be custom_interfaces

It’s niggling errors like this, which is the reason why it takes far longer than 20 hours to finish the course.

Thank you for your help.

1 Like
4

Let’s have a look at this and get back to you. Thanks for the information.

5

Hi, thank you for bringing this to our attention.

I went through the exercise and the issue is that the instructions have a typo. The package is created as custom_interface when it should be custom_interfaces .

The notebook will be corrected