My code is flawed.When I use the code, I must pass bias, So I don’t set bias=False.I think your comment is perfect to solve this problem.I reconfirm the version of pytorch is 1.3.1. But I can not find ATen/native/cudnn/Conv.cpp in the installation path of pytorch(I use pip3 install torch torchvision --user). How do I solve this problem. Meanwhile, I meet a new Error, RuntimeError: Expected tensor’s dynamic type to be Variable, not Tensor  2. I am confused and looking for a solution.@ptrblck