I create a new env, and I used TrainingAreaReplicator for multiple training. After I click on the “Play” button, I can see multiple training areas (num_area = 32) in the window. However, after I started training with “mlagents-learn config\xxx.yaml --run-id=xxx”, I can only see a single training area in my unity window. I dont know if my TrainingAreaReplicator works while training.
maybe try the option: --num-areas ?