No registered env with id: halfcheetah-medium-v2

[QuBohao]

When I run "python scripts/train.py --dataset halfcheetah-medium-v2", then exception occurred : "gym.error.UnregisteredEnv: No registered env with id: halfcheetah-medium-v2". And my gym version and mujoco version are all same as environment.yml

[jannerm]

This environment should be registered upon importing d4rl, so my guess is that something is wrong with the d4rl installation. You can check your installation by running:

python -c "import d4rl; print([k for k in d4rl.infos.DATASET_URLS.keys() if 'halfcheetah' in k])"

There should be a list of halfcheetah environments printed out.

Alternatively, you can use my docker image with:

docker pull jannerm/trajectory

for something that will work out of the box.