matthew@MatthewGan:~$ ros2 topic echo /cmd_vel
2024-09-30 10:55:37.587 [RTPS_TRANSPORT_SHM Error] Failed init_port fastrtps_port -> Function open_port_internal
t7429: open_and_lock_file failed -> Function open_port_internal
matthew@MatthewGan:~$ ros2 doctor --report | grep fastrtps
2024-09-30 10:59:04.943 [RTPS_TRANSPORT_SHM Error] Failed init_port fastrtps_port
t7429: open_and_lock_file failed -> Function open_port_internal
rosidl_typesupport_fastrtps_cpp : latest=6.2.7, local=6.2.7
rmw_fastrtps_shared_cpp : latest=2.2.2, local=2.2.2
rosidl_typesupport_fastrtps_cpp : latest=2.2.2, local=2.2.2
rmw_fastrtps_cpp : latest=2.2.2, local=2.2.2
fastrtps_cmake_module : latest=2.2.2, local=2.2.2
rosidl_typesupport_fastrtps_c : latest=2.2.2, local=2.2.2middleware name : rmw_fastrtps_cpp
matthew@MatthewGan:~$ ros2 topic echo /cmd_vel
2024-09-30 10:59:51.943 [RTPS_TRANSPORT_SHM Error] Failed init_port fastrtps_port
t7429: open_and_lock_file failed -> Function open_port_internal
