Training Process: ModuleNotFoundError: No module named 'torch'

Development Programming & Scripting
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1

Hi I started getting this crash since the 5.4 release. Before the training was working fine and now I can’t start my training anymore.

Here’s the error log below:

LogLearning: Display: Training Process: File “D:\Program Files (x86)\UE_5.4\Engine\Plugins\Experimental\LearningAgents\Content\Python\train_ppo.py”, line 341, in
LogLearning: Display: Training Process: import torch
LogLearning: Display: Training Process: ModuleNotFoundError: No module named ‘torch’
LogLearning: Warning: Training Process finished with warnings or errors
LogLearning: Error: Trainer_0: Error sending policy to trainer: Unexpected communication received. Check log for additional errors.

Cheers,
James

2

Hello James,

  1. Make sure you did not remove the Python Foundation Packages plugin.

  2. Double check the paths in the “Trainer Path Settings”.

I can’t think of another reason this could have an issue. Hope you figure it out!

Brendan

3

Hi Brendan,

I got it working now! Thank you!

Cheers,
James

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4

Great, what ended up being the fix?

5

I think my tensor flow packages were being installed into c: and kept copying them over to my unreal directory, and along the way I muddled it since I had been doing that with the 5.3. fresh install and clean download for packages resolved

1 Like