Ros2 topic and ros2 node command problem in MAC

Anis_Koubaa · 2018-07-20T18:07:09.706Z

Hi

I installed ROS2 on MAC and I run talker/listener application and both worked fine, but I found this warning (although it worked fine).

Aniss-MacBook-Pro-3:~ akoubaa$ ros2 run demo_nodes_cpp listener
Failed to load entry point ‘launch’: No module named ‘rclpy._rclpy’
Failed to load entry point ‘echo’: No module named ‘rclpy._rclpy’
Here is a screenshot

21%20PM2458×866 533 KB

Then, I tried the commands
ros2 node list
and
ros2 topic list

and here there was serious problem as shown in the following two pictures

21%20PM%2023752×2064 1.29 MB

05%20PM3787×1899 3.82 MB

Is there any means to fix the problem?

Thanks
Anis

ROS Course for Beginners
https://www.udemy.com/ros-essentials/?couponCode=ROSDISCOURSE1

wjwwood · 2018-07-20T18:21:45.041Z

Please ask questions on answers.ros.org, see: https://github.com/ros2/ros2/wiki/Contact#troubleshooting

Also, please do not post pictures of text.

And please do not advertise in your signature. Making a post about a class or book is fine, but please do not include it in every post. It clutters conversations of which you’re a part.

Thanks.

Anis_Koubaa · 2018-07-20T18:22:24.229Z

Thanks and sorry for confusion!