Solved by ptrblck in post #2 
              
              
                I don’t know what kind of input shape you are using, but assume you are passing in a 3-dimensional tensor? 
If that’s the case, I would recommend to check all shapes in both models and make sure the layers work as intended. 
E.g. nn.RNN expects an input in the shape [seq_len, batch_size, features] b…