Improve training speed with training EXE

Hi, I want to train with .exe. so I package the game and train with
$ mlagents-learn your_config.yaml --run-id=xxx --env=your_exe_name --num-envs = 3.

After running, three Windows do appear, but only one window is running at any one time. The other two will be suspended.

So does anyone know what’s happened?

If this hasn’t happened to you before, I also can record the screen to show what’s going on.

Ok, I find the answer " run in background".