Everything looks correct. I can only recommend to add debug output to one of the `library_path.sh` files to trace what is happening. Maybe also to the `ament_prepend_unique_value` function. For some reason it is not changing the environment variable for you the way it should. --- [Visit Topic](https://discourse.ros.org/t/talker-example-issue-with-beta-1/992/25) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: