Course1 Week 3 Programming assignment (Exercise 8_nn model)

If you are sure that all the internal tests in the notebook pass, the most likely cause is that some other part of the notebook infrastructure that the grader depends on has gotten corrupted accidentally. One thing to try would be to get a clean copy using the topic on the DLS FAQ Thread and then very carefully “copy/paste” over just your completed code from the “YOUR CODE HERE” sections and then try again.

Or if you have added any extra code cells in the notebook, I think the grader on this particular assignment will fail like this. Please check and delete any such extra cells first and see if that helps. If that’s not it, then try the “clean copy” method.