AttributeError: 'System' object has no attribute 'body_idx' in brax

[andy-james0310]

when running test/test_all_envs.py, there is AttributeError: 'System' object has no attribute 'body_idx' in carl_fetch and carl_humanoid environments.

[benjamc]

Do you mean in this line?
self.env.target_idx = self.env.sys.body.index["Target"]

If so, do you have the newest version of CARL?

Best wishes
🌞

[andy-james0310]

Thanks. The newest version has no this problem.

But, there is another problem when running the environments of Brax.

WARNING:absl:No GPU/TPU found, falling back to CPU. (Set TF_CPP_MIN_LOG_LEVEL=0 and rerun for more info.)

raise TypeError("len() of unsized object") from err # same as numpy error
TypeError: len() of unsized object

There is no problem in classic_control environments

[benjamc]

Could you provide a minimal working example for this error and/or explain more, when that happens?

[TheEimer]

I'll close this since there was no further example given. If anything else comes up, please open a new issue