@dirk-thomas yes, location of message_filter make it a challenging case for migration. As you said, split it out from ros_comm and into a small repo should be workable. That is also what I like, however, the thing which is not clear for me is, creating a new message_filter repo or put it a existing ROS2 repo, e.g rcutils? --- [Visit Topic](https://discourse.ros.org/t/syncronized-callbacks-in-ros2/2015/20) 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: