My environment is

ubuntu 16.04
python 3.5
RTX 2080 ti
cuda-9.0
cudnn 7

When I tried to train the model, there was RuntimeError (RuntimeError: CuDNN error: CUDNN_STATUS_SUCCESS).
First of all, I totally could not understand what above error means.
Furthermore the same code what I tried to train worked well on gtx 1080 ti (the rest environments are totally same as above)
What is the problem?