I followed this nav2 getting started guide without issue: I am now following this nav2 custom planner plugin tutorial

I have created a new plugin nav2_straightline_planner in my ws/src directory. And I have confirmed there are no typos between the sample code and mine. When trying to run

$ ros2 launch nav2_bringup tb3_simulation_launch.py params_file:=/ws/src/navigation2_tutorials/nav2_straightline_planner/nav2_params.yaml

I get the following error:

Failed to create global planner. Exception: According to the loaded plugin descriptions the class nav2_straightline_planner/StraightLine with base class type nav2_core::GlobalPlanner does not exist. Declared types are nav2_navfn_planner/NavfnPlanner

I have checked my CMAKELists has pluginlib_export_plugin_description_file(nav2_core global_planner_plugin.xml)

my global_planner_plugin.xml is the following

<library path="nav2_straightline_planner">
    <class name="nav2_straightline_planner/StraightLine" type="nav2_straightline_planner::StraightLine" base_class_type="nav2_core::GlobalPlanner">
      <description>This is an example plugin which produces straight path.</description>

And in my params.xml I have the following:

    plugins: ["GridBased"]
    use_sim_time: True
      plugin: "nav2_straightline_planner/StraightLine"
      interpolation_resolution: 0.1

1 Answer 1


Did you re-source your workspace's install directory?


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