[ros-users] [Discourse.ros.org] Ros2 topic and ros2 node command problem in MAC

Anis Koubaa ros.discourse at gmail.com
Fri Jul 20 18:17:26 UTC 2018



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%20PM|690x243](upload://xone0Pzr7xPst1rGB2GO1lyYgkz.png)

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%202|690x379](upload://jGFgITOUM2qqcZgSQ6Gjr4XhoMm.png)![05%20PM|690x346](upload://uqH9Q00hykL40A9kLBhC2pU2jmP.jpg)


Is there any means to fix the problem?

Thanks
Anis


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https://www.udemy.com/ros-essentials/?couponCode=ROSDISCOURSE1





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