ROS2 Topics "ros2 topic echo /cmd_vel" fails

Course Support ROS2 In 5 Days Python
4

Hi @albertoezquerro,

I have tried it again, with no success.

I have set up the following in my .bashrc file, could this temper with the shell?

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Instead of sourcing ROS2 and the workspace manually, I thought it is easier to put it in the .bashrc. It should not change anything, right?

Except that, when I run ros2 topic echo /cmd_vel right after starting the shell, I still get the same error. When I do ros2 topic info /cmd_vel, it works fine.