Please see attachment for error message and my code
There should be a previous cell which looks like this:
parameters = initialize_parameters()
You need to run that cell before you run the test for the forward propagation routine.
Mind you, I would say this is a bit “sketchy” as a way to structure things, because it means the cells only work if you always run them in the same order. It would be been “better” in my opinion if they had included the initialization of parameters in the test cell that references it.
that’s what I did. and embarrassed to make such a simple mistake…so I delete the post 