The meta typesupport `rosidl_typesupport_cpp` is being used correctly and contains both typesupports: `rosidl_typesupport_connext_cpp` as well as `rosidl_typesupport_introspection_cpp`. I don't see why both rmw implementations can't extract their matching typesupport. Reviewing the conversation you mentioned that you have sourced the setup file after building the workspace but your steps above don't include that (https://discourse.ros.org/t/talker-example-issue-with-beta-1/992/5). Can you please post the `LD_LIBRARY_PATH` from the shell you run the talker from. I am sorry. I don't know what else to debug. --- [Visit Topic](https://discourse.ros.org/t/talker-example-issue-with-beta-1/992/15) 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: