libign_ros2_control-system.so: undefined symbol

[august779188]

When I run this command:ros2 launch ign_ros2_control_demos cart_example_effort.launch.py,
the whole program crashes and the log output is ign gazebo server:

• symbol lookup error: /opt/ros/humble/lib/libign_ros2_control-system.so: undefined symbol: _ZN18hardware_interface15ResourceManager9load_urdfERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEbb

• [ERROR] [ros2-4]: process has died [pid 26055, exit code 2, cmd 'ros2 control load_controller --set-state active joint_state_broadcaster'].

Is there a solution?

[christophfroehlich]

Which operating system are you using, and how did you install ign_ros2_control?

[andreacelani]

I fixed with:
sudo apt-get update
sudo apt-get upgrade

and then compiling from source.

I also added:
export IGN_GAZEBO_SYSTEM_PLUGIN_PATH=/opt/ros/humble/lib/
export GZ_SIM_SYSTEM_PLUGIN_PATH=/opt/ros/humble/lib/

to .bashrc

hope this help