Since the size is `2` can you please also output `print ((type_support_map_t *)(type_supports.data)).typesupport_identifier[1]`. But I assume it will be `rosidl_typesupport_introspection_cpp` since everything else looks consistent and correct. --- [Visit Topic](https://discourse.ros.org/t/talker-example-issue-with-beta-1/992/13) 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: