C1, Wk4,assignment 1, Exercise 4 - linear_activation_forward: "local variable 'A' referenced before assignment: "local variable 'A' referenced before assignment"

Course Q&A Deep Learning Specialization Neural Networks and Deep Learning
1

Hi there.

I have this UnboundLocalError
“local variable ‘A’ referenced before assignment”

Ex_4_unbound_alert
Ex_4_unbound_alert1273×574 82.4 KB

I am not referencing A before assignment as far as I know. Please talk me through what this actually means. Nobody else seems to have experienced this, so I am doubtless making a rather basic mistake.

Thank you

2

You misspelled the variable name A_prev. Dash and underscore are not the same thing. As a result, it interprets that as a subtraction, right? A minus prev. That will not end well.

3

Apologies for wasting your time. That definitely qualifies as a rather basic mistake.
I have increased the degree of zoom on my browser.