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I'm using ros2 foxy on ubuntu 20.04 with Gazebo multi-robot simulator, version 11.10.2 I'm trying to simulate a robot using the plugin libgazebo_ros_p3d as I need to have the position over the time published on a topic "odom".

My code work fine with and without the plugin (the simulation starts and I can control my robot), I even have other plugins used (IMU and diff-drive). However the plugins seem to not work (nothing is published) and i get the error :

[gazebo-4] [ERROR] [1652081431.073520636] [p3d.libgazebo_ros_p3d]: body_name: base_link does not exist

here is my code simplified :

<robot name="my_robot">
  <!-- link used to allow base_link to have an inertia-->
  <link name="dummy">
  <!-- Robot Base_link -->
  <link name="base_link">
      <origin rpy="0 0 0" xyz="0.24765 0 0.16755"/>
        <box size="0.4953 0.5505 0.3351"/>
      <material name="Cyan">
        <color rgba="0 1.0 1.0 1.0"/>
      <origin rpy="0 0 0" xyz="0.24765 0 0.16755"/>
        <box size="0.4953 0.349 0.3351"/>
    <plugin name="libgazebo_ros_p3d" filename="libgazebo_ros_p3d.so">
      <joint name="dummy_joint" type="fixed">
        <parent link="dummy"/>
        <child link="base_link"/>

BTW I have Inertial tags but id didn't paste them here to make the code a little bit easier to read, though i'm far from being an expert so if you belive I should add them i will !

Is there a way to make this plugin work with my code ? Or is there another way to publish odom as position over the time ? I can't seem to find much documentation on this subject sadly.

Thank you to anyone who took the time to read my question

Originally posted by Bastian2909 on ROS Answers with karma: 68 on 2022-05-09

Post score: 0


1 Answer 1


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Check in Gazebo what the body is called. Gazebo will merge static links together to make calculations and such easier. I wouldn't be surprised if your body is called dummy since that's the main link.

You can check it in Gazebo in the left panel. There you should be able to collapse a thing called Models. Find your model, collapse that and check what links are in there.

Originally posted by Joe28965 with karma: 1124 on 2022-05-09

This answer was ACCEPTED on the original site

Post score: 1

Original comments

Comment by Bastian2909 on 2022-05-09:
thank you so much, it was indeed called dummy !


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