Hi @marguedas, Thanks a lot for your detailed reply. Actually I'm not sure which library exactly cause the conflict. I just remove all the unnecessary ROS1 libraries with apt-get autoremove. One of the related libraries is poco. I did remove the ROS1 environment setting but it seemed that it didn't work. Thanks. --- [Visit Topic](https://discourse.ros.org/t/is-there-any-compiling-conflict-between-latest-ros2-and-ros1/3538/3) 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: