Packages that depend on the old version could specify it in their package.xml using: http://www.ros.org/reps/rep-0140.html#id14 Unfortunately, if two packages in a system require different versions, there will not be a good solution for both packages. I don't know if BT is extended enough to consider this possibility, keeping in mind that people will end up switching to the new version sooner or later. --- [Visit Topic](https://discourse.ros.org/t/behaviortree-cpp-and-groot-version-3-0-released/8068/4) 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: