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Hi @tengfei

Even if you add source ~/catkin_ws/devel/setup.bash to your ~/.bashrc file, it only will be automatically executed when you open a shell.

If you create new packages, the setup.bash won't be automatically executed on the shell that is already open, then, what I do is to run the following commands every time I create a new ROS Package:

source ~/catkin_ws/devel/setup.bash
rospack profile

Probably only one of then would work, but I always run both commands to make sure it will find my recent created packages, messages, etc.