Hi,
I am launching the bt_navigator node for section III of the rosject according to the tutorial. I get the following error:
[lifecycle_manager-5] [INFO] [1679357904.450561202] [lifecycle_manager_path_planning]: Configuring bt_navigator
[bt_navigator-3] [INFO] [1679357904.451416882] [bt_navigator]: Configuring
[bt_navigator-3] [ERROR] [1679357905.066196172] []: Caught exception in callback for transition 10
[bt_navigator-3] [ERROR] [1679357905.066240686] []: Original error: Could not load library: libnav2_single_trigger_bt_node.so: cannot open shared object file: No such file or directory
[bt_navigator-3] [WARN] [1679357905.066285944] []: Error occurred while doing error handling.
[bt_navigator-3] [FATAL] [1679357905.066303212] [bt_navigator]: Lifecycle node bt_navigator does not have error state implemented
[lifecycle_manager-5] [ERROR] [1679357905.067130382] [lifecycle_manager_path_planning]: Failed to change state for node: bt_navigator
[lifecycle_manager-5] [ERROR] [1679357905.067181139] [lifecycle_manager_path_planning]: Failed to bring up all requested nodes. Aborting bringup.
I was reading about similar problems in google and it could be related with ROS2 version but I don’t know how to solve it.
Best Regards
Ronaldo
Hi @w.ronaldo.cd ,
I think I have a small clue as to why you are getting the error.
This is because the rosject uses Foxy version, whereas the course uses Galactic version.
Some things that you copy-paste from Galactic version into Foxy version will not work.
From my experience, the only files having the problem is the bt_navigator.yaml file and the behavior.xml file.
Please post the following as code-block:
- Launch file containing the
bt_navigator node.
-
bt_navigator.yaml file
-
behavior.xml file
I know which ones to remove after seeing your contents of the above files.
Regards,
Girish
Hi @girishkumar.kannan
behavior.xml:
<root main_tree_to_execute="MainTree">
<BehaviorTree ID="MainTree">
<RecoveryNode number_of_retries="6" name="NavigateRecovery">
<PipelineSequence name="NavigateWithReplanning">
<RateController hz="1.0">
<RecoveryNode number_of_retries="1" name="ComputePathToPose">
<ComputePathToPose goal="{goal}" path="{path}" planner_id="GridBased"/>
<ClearEntireCostmap service_name="global_costmap/clear_entirely_global_costmap"/>
</RecoveryNode>
</RateController>
<RecoveryNode number_of_retries="1" name="FollowPath">
<FollowPath path="{path}" controller_id="FollowPath"/>
<ClearEntireCostmap service_name="local_costmap/clear_entirely_local_costmap"/>
</RecoveryNode>
</PipelineSequence>
<SequenceStar name="RecoveryActions">
<ClearEntireCostmap service_name="local_costmap/clear_entirely_local_costmap"/>
<ClearEntireCostmap service_name="global_costmap/clear_entirely_global_costmap"/>
<Spin spin_dist="1.57"/>
<Wait wait_duration="5"/>
</SequenceStar>
</RecoveryNode>
</BehaviorTree>
</root>
bt_navigator.yaml
bt_navigator:
ros__parameters:
use_sim_time: True
global_frame: map
robot_base_frame: base_link
odom_topic: /odom
bt_loop_duration: 10
default_server_timeout: 20
default_nav_to_pose_bt_xml: "/home/user/ros2_ws/src/Navigation_rosject/project_path_planning/config/behavior.xml"
plugin_lib_names:
- nav2_compute_path_to_pose_action_bt_node
- nav2_compute_path_through_poses_action_bt_node
- nav2_follow_path_action_bt_node
- nav2_back_up_action_bt_node
- nav2_spin_action_bt_node
- nav2_wait_action_bt_node
- nav2_clear_costmap_service_bt_node
- nav2_is_stuck_condition_bt_node
- nav2_goal_reached_condition_bt_node
- nav2_goal_updated_condition_bt_node
- nav2_initial_pose_received_condition_bt_node
- nav2_reinitialize_global_localization_service_bt_node
- nav2_rate_controller_bt_node
- nav2_distance_controller_bt_node
- nav2_speed_controller_bt_node
- nav2_truncate_path_action_bt_node
- nav2_goal_updater_node_bt_node
- nav2_recovery_node_bt_node
- nav2_pipeline_sequence_bt_node
- nav2_round_robin_node_bt_node
- nav2_transform_available_condition_bt_node
- nav2_time_expired_condition_bt_node
- nav2_distance_traveled_condition_bt_node
- nav2_single_trigger_bt_node
- nav2_is_battery_low_condition_bt_node
- nav2_navigate_through_poses_action_bt_node
- nav2_navigate_to_pose_action_bt_node
- nav2_remove_passed_goals_action_bt_node
Launch file:
def generate_launch_description():
config_dir = os.path.join(get_package_share_directory('project_path_planning'), 'config')
bt_navigator_yaml = os.path.join(config_dir, 'bt_navigator.yaml')
return LaunchDescription([
Node(
package='nav2_bt_navigator',
executable='bt_navigator',
name='bt_navigator',
output='screen',
parameters=[bt_navigator_yaml]),
These are the files, thanks for your help.
Best regards,
Ronaldo
Hi @w.ronaldo.cd ,
Just as I thought, your behavior.xml and bt_navigator.yaml requires changes.
bt_navigator.yaml did not have certain plugin libraries for Foxy during its release, which includes nav2_compute_through_poses.
Below you can find the correct files for Foxy version - the ROS2 version used in rosject currently.
= = = = = = = = = =
behavior.xml:
<!--
This Behavior Tree replans the global path periodically at 1 Hz, and has
recovery actions. Obtained from the official Nav2 package
-->
<!-- Foxy Version -->
<root main_tree_to_execute="MainTree">
<BehaviorTree ID="MainTree">
<RecoveryNode number_of_retries="6" name="NavigateRecovery">
<PipelineSequence name="NavigateWithReplanning">
<RateController hz="1.0">
<RecoveryNode number_of_retries="1" name="ComputePathToPose">
<ComputePathToPose goal="{goal}" path="{path}" planner_id="GridBased"/>
<ClearEntireCostmap name="ClearGlobalCostmap-Context" service_name="global_costmap/clear_entirely_global_costmap"/>
</RecoveryNode>
</RateController>
<RecoveryNode number_of_retries="1" name="FollowPath">
<FollowPath path="{path}" controller_id="FollowPath"/>
<ClearEntireCostmap name="ClearLocalCostmap-Context" service_name="local_costmap/clear_entirely_local_costmap"/>
</RecoveryNode>
</PipelineSequence>
<ReactiveFallback name="RecoveryFallback">
<GoalUpdated/>
<SequenceStar name="RecoveryActions">
<ClearEntireCostmap name="ClearLocalCostmap-Subtree" service_name="local_costmap/clear_entirely_local_costmap"/>
<ClearEntireCostmap name="ClearGlobalCostmap-Subtree" service_name="global_costmap/clear_entirely_global_costmap"/>
<Spin spin_dist="1.57"/>
<Wait wait_duration="5"/>
</SequenceStar>
</ReactiveFallback>
</RecoveryNode>
</BehaviorTree>
</root>
= = = = = = = = = =
bt_navigator.yaml (notice that a few plugins are removed):
NOTE / WARNING / ATTENTION:
Please replace <your_package_name> to your package containing the bt_navigator.yaml config file - in the parameter default_bt_xml_filename.
= = = = = = = = = =
# Foxy Version
bt_navigator:
ros__parameters:
use_sim_time: True
global_frame: map
robot_base_frame: base_footprint # base_link
odom_topic: /odom
enable_groot_monitoring: True
groot_zmq_publisher_port: 1666
groot_zmq_server_port: 1667
default_bt_xml_filename: "/home/user/ros2_ws/src/<your_package_name>/config/behavior.xml"
plugin_lib_names:
- nav2_compute_path_to_pose_action_bt_node
- nav2_follow_path_action_bt_node
- nav2_back_up_action_bt_node
- nav2_spin_action_bt_node
- nav2_wait_action_bt_node
- nav2_clear_costmap_service_bt_node
- nav2_is_stuck_condition_bt_node
- nav2_goal_reached_condition_bt_node
- nav2_goal_updated_condition_bt_node
- nav2_initial_pose_received_condition_bt_node
- nav2_reinitialize_global_localization_service_bt_node
- nav2_rate_controller_bt_node
- nav2_distance_controller_bt_node
- nav2_speed_controller_bt_node
- nav2_truncate_path_action_bt_node
- nav2_goal_updater_node_bt_node
- nav2_recovery_node_bt_node
- nav2_pipeline_sequence_bt_node
- nav2_round_robin_node_bt_node
- nav2_transform_available_condition_bt_node
- nav2_time_expired_condition_bt_node
- nav2_distance_traveled_condition_bt_node
= = = = = = = = = =
Also, when I asked you to share your launch file, I wanted the complete file contents, not just the Node declaration of bt_navigator. Please re-post the complete launch file.
Regards,
Girish
PS: The above referenced contents for the behavior.xml and bt_navigator.yaml were obtained from this post: Path planning error - ROS2 Navigation course - #3 by rtellez
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