If you are following this tutorial, you will run into an issue setting up your Imitation Trainer:
It’s not shown in the tutorial, but you will need to set up a process and communicator as the previous tutorials show when setting up the PPO trainer. Importantly, you need to change the Trainer File Name from train_ppo to train_behavior_cloning in the Trainer Process Settings as I show here:
Hopefully this helps others over this stumbling block, as once it’s working this tool is fantastic!