Solved by AlphaBetaGamma96 in post #2 
              
              
                Could you post the line that causes the error? What it seems is happening is you’re multiplying a nn.Conv2d object with a Tensor rather than calling it. 
For example, 
conv = nn.Conv2d(1,6,5)
input = torch.randn(1,1,32,32)

conv(input) #returns Tensor of shape: torch.Size([1, 6, 28, 28])

whereas co…