Error Message: Unable to find AckermannDriveStamped message type

[ckr90]

Hello, I wanted to create an Action Graph for Ackermann Steering and I get this error message when I want to start the simulation. Is there anything I have to pay attention when I am implementing an Graph for Ackermann?

Could not load the dynamic library from libackermann_msgs__rosidl_generator_c.so. Error: libackermann_msgs__rosidl_generator_c.so: cannot open shared object file: No such file or directory
Could not load the dynamic library from libackermann_msgs__rosidl_typesupport_c.so. Error: libackermann_msgs__rosidl_typesupport_c.so: cannot open shared object file: No such file or directory
libackermann_msgs__rosidl_generator_c.so does not contain ackermann_msgs__msg__AckermannDriveStamped__create
2024-01-31 08:54:22 [1,071,419ms] [Error] [omni.isaac.ros2_bridge.plugin] Unable to find AckermannDriveStamped message type

[Simplychenable]

@ckr90 i am just a passerby, but which Isaac Sim version are you using?

[Ayush_G]

Hi @ckr90,

If you are using Isaac SIm 2023.1.1, it seems like ackermann_msgs is not installed on your system? If you are on Ubuntu you can install the binary installation by running sudo apt install ros-humble-ackermann-msgs.

Please ensure you source ROS2 in your .bashrc file or source it in the same terminal before running ./isaac_sim.sh.

[ckr90]

Hi, thank you for your answer. I have already solved the problem. As you said, the messages haven’t been installed yet.