'tuple' object has no attribute 'dim

As an AI language model, I don't have enough context to accurately diagnose the cause of the error message you are experiencing. However, based on the error message you provided, it seems that you might be trying to access or use a property or method called 'dim' on a tuple object, but tuples don't have such a property or method. If you could provide some more information about the code you are working on and the specific line where the error occurs, I may be able to provide more specific guidance.