For example:
I am engineer in Centria UAS, Finland.
My problem is the keyerror "arg" generated when running the demo files, and it happened in Ubuntu 20.04, ROS2 Foxy.
used command: ros2 launch tm_moveit_cpp_demo tm12_run_moveit_cpp.launch.py robot_ip:=192.168.10.2
[INFO] [launch]: All log files can be found below /home/milan/.ros/log/2023-02-22-13-43-30-162939-cena-Latitude-7280-16730
[INFO] [launch]: Default logging verbosity is set to INFO
Task exception was never retrieved
future: <Task finished name='Task-2' coro=<LaunchService._process_one_event() done, defined at /opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py:226> exception=InvalidLaunchFileError('py')>
Traceback (most recent call last):
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_file_utilities.py", line 53, in get_launch_description_from_any_launch_file
return loader(launch_file_path)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/python_launch_file_utilities.py", line 68, in get_launch_description_from_python_launch_file
return getattr(launch_file_module, 'generate_launch_description')()
File "/home/milan/tmdriver_ws/install/tm_moveit_cpp_demo/share/tm_moveit_cpp_demo/launch/tm12_run_moveit_cpp.launch.py", line 48, in generate_launch_description
robot_description_config = xacro.process_file(
File "/home/milan/.local/lib/python3.8/site-packages/xacro/init.py", line 1020, in process_file
process_doc(doc, **kwargs)
File "/home/milan/.local/lib/python3.8/site-packages/xacro/init.py", line 967, in process_doc
eval_all(doc.documentElement, macros, symbols)
File "/home/milan/.local/lib/python3.8/site-packages/xacro/init.py", line 852, in eval_all
if name not in substitution_args_context['arg']:
KeyError: 'arg'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 228, in _process_one_event
await self.process_event(next_event)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 248, in process_event
visit_all_entities_and_collect_futures(entity, self.context))
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures
futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures
futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
File "/opt/ros/foxy/lib/python3.8/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/foxy/lib/python3.8/site-packages/launch/action.py", line 108, in visit
return self.execute(context)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/include_launch_description.py", line 130, in execute
launch_description = self.launch_description_source.get_launch_description(context)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_source.py", line 84, in get_launch_description
self._get_launch_description(self.__expanded_location)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_description_source.py", line 53, in _get_launch_description
return get_launch_description_from_any_launch_file(location)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_file_utilities.py", line 56, in get_launch_description_from_any_launch_file
raise InvalidLaunchFileError(extension, likely_errors=exceptions)
launch.invalid_launch_file_error.InvalidLaunchFileError: Caught exception when trying to load file of format [py]: 'arg'
For example: I am engineer in Centria UAS, Finland. My problem is the keyerror "arg" generated when running the demo files, and it happened in Ubuntu 20.04, ROS2 Foxy.
used command: ros2 launch tm_moveit_cpp_demo tm12_run_moveit_cpp.launch.py robot_ip:=192.168.10.2
[INFO] [launch]: All log files can be found below /home/milan/.ros/log/2023-02-22-13-43-30-162939-cena-Latitude-7280-16730 [INFO] [launch]: Default logging verbosity is set to INFO Task exception was never retrieved future: <Task finished name='Task-2' coro=<LaunchService._process_one_event() done, defined at /opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py:226> exception=InvalidLaunchFileError('py')> Traceback (most recent call last): File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_file_utilities.py", line 53, in get_launch_description_from_any_launch_file return loader(launch_file_path) File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/python_launch_file_utilities.py", line 68, in get_launch_description_from_python_launch_file return getattr(launch_file_module, 'generate_launch_description')() File "/home/milan/tmdriver_ws/install/tm_moveit_cpp_demo/share/tm_moveit_cpp_demo/launch/tm12_run_moveit_cpp.launch.py", line 48, in generate_launch_description robot_description_config = xacro.process_file( File "/home/milan/.local/lib/python3.8/site-packages/xacro/init.py", line 1020, in process_file process_doc(doc, **kwargs) File "/home/milan/.local/lib/python3.8/site-packages/xacro/init.py", line 967, in process_doc eval_all(doc.documentElement, macros, symbols) File "/home/milan/.local/lib/python3.8/site-packages/xacro/init.py", line 852, in eval_all if name not in substitution_args_context['arg']: KeyError: 'arg'
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 228, in _process_one_event await self.process_event(next_event) File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 248, in process_event visit_all_entities_and_collect_futures(entity, self.context)) File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context) File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context) File "/opt/ros/foxy/lib/python3.8/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/foxy/lib/python3.8/site-packages/launch/action.py", line 108, in visit return self.execute(context) File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/include_launch_description.py", line 130, in execute launch_description = self.launch_description_source.get_launch_description(context) File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_source.py", line 84, in get_launch_description self._get_launch_description(self.__expanded_location) File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_description_source.py", line 53, in _get_launch_description return get_launch_description_from_any_launch_file(location) File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_file_utilities.py", line 56, in get_launch_description_from_any_launch_file raise InvalidLaunchFileError(extension, likely_errors=exceptions) launch.invalid_launch_file_error.InvalidLaunchFileError: Caught exception when trying to load file of format [py]: 'arg'