Hi, In Week 2 – Module 2: The PyTorch Workflow, EMNIST Letter Detective, every time I submit the notebook I get: “An unexpected error occurred. Please try again later.” Score is always 0/50 with 0/10 for all exercises, even when the notebook runs without errors and tests pass. I have tried…

Hi @Timotheos , Please make sure of the following: The assignment you are working in and at the time of pressing “submit” button is named as C1M2_Assignment.ipynb Make sure you are not using any global variables inside the exercises (using function parameters instead as you should be). If the iss…

Hi @Mubsi , thanks for the reply - the filename is correct. Also, I am not using any global variables - everything is according to the coding exercise. The issue still remains. Best Timotheos

@Mubsi shouldn’t these gotchas be mentioned on every graded notebook just like in dls?

So I start plain vanilla with a fresh notebook (“restored from original“) and solve the first exercise. I only modify the code within the marks. The unittest passes but I still get the unexpected error message. I finished the complete course already except for this exercise. Here is a screenshot aga…

Hi @Timotheos , I’m going to send you a direct message regarding this. Best, Mubsi

Once Timotheos filled all of the exercises and ran the cell which saves the model needed for grading, the grader worked as expected.

The grader continues to struggle with giving useful feedback when an attempt is made to grade an incomplete notebook.

I have similar issue I am able to run full assignment and it seems to be running well but keep hitting the grading error when submitting

What is the detailed feedback from the grader? Please post some screen capture images.

Hi @quantlab , Did you run this cell before submitting the assignment for grading? [Screenshot 2025-12-22 at 6.42.37 PM] If so, and the issue remains, let me know. Best, Mubsi

C1M2 Grader fails: unexpected error on submission

Course Q&A Professional Certificate:PyTorch for Deep Learning PyTorch: Fundamentals

Deepti_Prasad December 23, 2025, 2:47pm 16

this should help you

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C1M2 Grader fails: unexpected error on submission

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