Running SAC: Operation failed to compute its gradient

[ian-cannon]

Environment:

• torch==1.5.0
• mujoco-py==2.0.2.10

Usage:
python main.py --env-name Humanoid-v2 --alpha 0.05

Error:
RuntimeError: one of the variables needed for gradient computation has been modified by an inplace operation: [torch.FloatTensor [256, 1]], which is output 0 of TBackward, is at version 3; expected version 2 instead. Hint: the backtrace further above shows the operation that failed to compute its gradient. The variable in question was changed in there or anywhere later. Good luck!

Hello there,
I am trying to run SAC and am getting the error shown above. I was told that rolling back to Torch 1.0.0 would fix the issue(installing now), but I do not understand why. Is this something that you are aware of?

[ian-cannon]

I have verified, the code still works with Torch 1.0.0

[pranz24]

It is working

Git clone again and try

[cuijianaaa]

I use torch==1.4.0 can fix this.