No such file or directory: 'models/jvrc_mj_description/xml/scene.xml'

[Ishihara-Masabumi]

When I train this repository, the follwing error occurred.

python3 run_experiment.py train --logdir log --num_procs 4 --env jvrc_walk
Wrapping in SymmetricEnv.
Modifying XML model...
Traceback (most recent call last):
  File "run_experiment.py", line 121, in <module>
    run_experiment(args)
  File "run_experiment.py", line 36, in run_experiment
    mirrored_obs=env_fn().robot.mirrored_obs,
  File "/home/dl/Humanoid/LearningHumanoidWalking/envs/jvrc/jvrc_walk.py", line 22, in __init__
    builder(path_to_xml_out)
  File "/home/dl/Humanoid/LearningHumanoidWalking/envs/jvrc/gen_xml.py", line 12, in builder
    mjcf_model = mjcf.from_path(JVRC_DESCRIPTION_PATH)
  File "/home/dl/Humanoid/Humanoid/lib/python3.8/site-packages/dm_control/mjcf/parser.py", line 102, in from_path
    contents = resources.GetResource(path)
  File "/home/dl/Humanoid/Humanoid/lib/python3.8/site-packages/dm_control/utils/io.py", line 22, in GetResource
    with open(name, mode=mode) as f:
FileNotFoundError: [Errno 2] No such file or directory: 'models/jvrc_mj_description/xml/scene.xml'

Please let me know how to fix it.

[rohanpsingh]

Hi, it seems you don't have the submodule in your path. Did you clone with the --recurse-submodules ?

[Ishihara-Masabumi]

Thanks, it is going well. BTW, please tell me the following message item meanings.

• Return (batch)
• Mean Eplen
• Clip Fraction

Are the following losses are the less the better?

• Actor loss, Critic loss, Mirror loss

Are the following values are the greater the better?

• Mean KL Div, Mean Entropy

Best regards,

[rohanpsingh]

It's difficult to explain the meaning of each term, I recommend you to check out Stable-Baselines for a better documentation. In general, losses should go down. Mean entropy should remain constant. In my case, I don't monitor each item carefully. Most importantly, the return and the ep_len should go up!