Can't use chainer in W10 with CUDA 11.1

When trying to run chainer, I get the following error message:

Traceback (most recent call last):
  File "train_dcgan.py", line 178, in <module>
    main()
  File "train_dcgan.py", line 65, in main
    chainer.cuda.get_device_from_id(args.gpu).use()
  File "C:\Users\Beri\miniconda3\envs\ganDemo\lib\site-packages\chainer\backends\cuda.py", line 279, in get_device_from_id
    check_cuda_available()
  File "C:\Users\Beri\miniconda3\envs\ganDemo\lib\site-packages\chainer\backends\cuda.py", line 142, in check_cuda_available
    raise RuntimeError(msg)
RuntimeError: CUDA environment is not correctly set up
(see https://github.com/chainer/chainer#installation).No module named 'cupy.util'

This works fine if using CUDA 10.2, but it has no support for the most recent NVIDIA GPUs.

• Conditions:

Platform: Windows-10-10.0.19041-SP0 Chainer: 7.7.0 ChainerX: Not Available NumPy: 1.19.3 CuPy: Not Available iDeep: Not Available

• Chainer version: 7.7.0
• CuPy version: cupy-cuda111==8.1.0
• OS/Platform: Windows 10 x64
• CUDA/cuDNN version: CUDA 11.1/cuDNN 8.0.4.30

[iegorval]

@DiKorsch ok, thank you for the fast reply. I guess I will open a new issue then.

[DiKorsch]

@iegorval, yes, this is the change, that fixed the problem for me 🤷