ROS2: Turtlebot3 tutorial. launch error.

edit

Hi there! I'm using turtlebot3 and i got a problem.

My system is ROS2 Foxy, Ubuntu 20.04LTS

https://emanual.robotis.com/docs/en/p...

In this tutorial, I had installed simulation packages. It was good.

But in the second tutorial that launch the packages, the error occurred.

The error is here

~/turtlebot3_ws$ export TURTLEBOT3_MODEL=burger

~/turtlebot3_ws$ ros2 launch turtlebot3_gazebo empty_world.launch.py

Package 'turtlebot3_gazebo' not found: "package 'turtlebot3_gazebo' not found, searching: ['/opt/ros/foxy']"

I think he said "I couldn't find the package!"

so I paste the [turtlebot3_gazebo] package directory into the route where contain packages. [ /opt/ros/foxy/share ].

But same error still occurred.

what is wrong?

thank you : >