Solved by Abhilash_Srivastava in post #5 
              
              
                Two things: 

Can you share the part where you are reading, preparing the data and vocab. If you’re using a text field maybe try: 
text_field = data.Field(lower=True, fix_length=100)

I think this part can be moved inside model definition:


Make sure the input sequence lengths are the same (for all…