Solved by ptrblck in post #2 
              
              
                I don’t know what exactly you’ve changed, but this code works for me without a GPU: 
import torch

print(torch.cuda.is_available())

waveglow = torch.hub.load('NVIDIA/DeepLearningExamples:torchhub', 'nvidia_waveglow', model_math='fp32')
waveglow = waveglow.remove_weightnorm(waveglow)
waveglow.eval()…