ubuntu@ubuntu:~/turtlebot3_ws$ ros2 launch turtlebot3_bringup robot.launch.py
[INFO] [launch]: All log files can be found below /home/ubuntu/.ros/log/2022-09-08-10-44-07-366243-ubuntu-17884
[INFO] [launch]: Default logging verbosity is set to INFO
urdf_file_name : turtlebot3_waffle.urdf
[ERROR] [launch]: Caught exception in launch (see debug for traceback): init() missing 1 required keyword-only argument: ‘node_executable’
[INFO] [robot_state_publisher-1]: process started with pid [17894]
Task exception was never retrieved
future: <Task finished coro=<LaunchService._process_one_event() done, defined at /opt/ros/dashing/lib/python3.6/site-packages/launch/launch_service.py:179> exception=RuntimeError(‘Signal event received before subprocess transport available.’,)>
Traceback (most recent call last):
File “/opt/ros/dashing/lib/python3.6/site-packages/launch/launch_service.py”, line 181, in _process_one_event
await self.__process_event(next_event)
File “/opt/ros/dashing/lib/python3.6/site-packages/launch/launch_service.py”, line 201, in __process_event
visit_all_entities_and_collect_futures(entity, self.__context))
File “/opt/ros/dashing/lib/python3.6/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py”, line 38, in visit_all_entities_and_collect_futures
sub_entities = entity.visit(context)
File “/opt/ros/dashing/lib/python3.6/site-packages/launch/action.py”, line 59, in visit
return self.execute(context)
File “/opt/ros/dashing/lib/python3.6/site-packages/launch/actions/opaque_function.py”, line 75, in execute
return self.__function(context, *self.__args, **self.__kwargs)
File “/opt/ros/dashing/lib/python3.6/site-packages/launch/actions/execute_process.py”, line 275, in __on_signal_process_event
raise RuntimeError(‘Signal event received before subprocess transport available.’)
RuntimeError: Signal event received before subprocess transport available.
[robot_state_publisher-1] Initialize urdf model from file: /home/ubuntu/turtlebot3_ws/install/turtlebot3_description/share/turtlebot3_description/urdf/turtlebot3_waffle.urdf
[robot_state_publisher-1] Parsing robot urdf xml string.
[robot_state_publisher-1] Link base_link had 7 children
[robot_state_publisher-1] Link camera_link had 2 children
[robot_state_publisher-1] Link camera_depth_frame had 1 children
[robot_state_publisher-1] Link camera_depth_optical_frame had 0 children
[robot_state_publisher-1] Link camera_rgb_frame had 1 children
[robot_state_publisher-1] Link camera_rgb_optical_frame had 0 children
[robot_state_publisher-1] Link caster_back_left_link had 0 children
[robot_state_publisher-1] Link caster_back_right_link had 0 children
[robot_state_publisher-1] Link imu_link had 0 children
[robot_state_publisher-1] Link base_scan had 0 children
[robot_state_publisher-1] Link wheel_left_link had 0 children
[robot_state_publisher-1] Link wheel_right_link had 0 children
[robot_state_publisher-1] got segment base_footprint
[robot_state_publisher-1] got segment base_link
[robot_state_publisher-1] got segment base_scan
[robot_state_publisher-1] got segment camera_depth_frame
[robot_state_publisher-1] got segment camera_depth_optical_frame
[robot_state_publisher-1] got segment camera_link
[robot_state_publisher-1] got segment camera_rgb_frame
[robot_state_publisher-1] got segment camera_rgb_optical_frame
[robot_state_publisher-1] got segment caster_back_left_link
[robot_state_publisher-1] got segment caster_back_right_link
[robot_state_publisher-1] got segment imu_link
[robot_state_publisher-1] got segment wheel_left_link
[robot_state_publisher-1] got segment wheel_right_link
[robot_state_publisher-1] Adding fixed segment from base_footprint to base_link
[robot_state_publisher-1] Adding fixed segment from base_link to camera_link
[robot_state_publisher-1] Adding fixed segment from camera_link to camera_depth_frame
[robot_state_publisher-1] Adding fixed segment from camera_depth_frame to camera_depth_optical_frame
[robot_state_publisher-1] Adding fixed segment from camera_link to camera_rgb_frame
[robot_state_publisher-1] Adding fixed segment from camera_rgb_frame to camera_rgb_optical_frame
[robot_state_publisher-1] Adding fixed segment from base_link to caster_back_left_link
[robot_state_publisher-1] Adding fixed segment from base_link to caster_back_right_link
[robot_state_publisher-1] Adding fixed segment from base_link to imu_link
[robot_state_publisher-1] Adding fixed segment from base_link to base_scan
[robot_state_publisher-1] Adding moving segment from base_link to wheel_left_link
[robot_state_publisher-1] Adding moving segment from base_link to wheel_right_link
[ERROR] [robot_state_publisher-1]: process[robot_state_publisher-1] failed to terminate ‘5’ seconds after receiving ‘SIGINT’, escalating to ‘SIGTERM’
[INFO] [robot_state_publisher-1]: sending signal ‘SIGTERM’ to process[robot_state_publisher-1]
[ERROR] [robot_state_publisher-1]: process has died [pid 17894, exit code -15, cmd ‘/opt/ros/dashing/lib/robot_state_publisher/robot_state_publisher /home/ubuntu/turtlebot3_ws/install/turtlebot3_description/share/turtlebot3_description/urdf/turtlebot3_waffle.urdf __node:=robot_state_publisher __params:=/tmp/launch_params_0_05q304’].
I ran the bringup in dashing and followed the turtlebot manual.