NameError: name 'PointMassEnv' is not defined

[dyabel]

Hi, I have followed your installation instruction and run the example task but I got this issue, can you help me figure it out? Thx.

[wyqsss]

Hi, I have followed your installation instruction and run the example task but I got this issue, can you help me figure it out? Thx.

this is because "cannot re-register id:".you shoule remove them before register in the three file.
envs/d4rl/d4rl_content/pointmaze/init.py
envs/d4rl/d4rl_content/locomotion/init.py
envs/d4rl/d4rl_content/gym_bullet/init.py

import gym
env_dict = gym.envs.registration.registry.env_specs.copy()
for env in env_dict:
    if 'antmaze' in env:
        print('Remove {} from registry'.format(env))
        del gym.envs.registration.registry.env_specs[env]