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 restoring the original notebook, rerunning all cells, and resubmitting multiple times and still get the same message.
Could someone please check whether there is an issue with the autograder for this assignment or advise on next steps?
Mubsi
December 22, 2025, 11:32am
2
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 issue remains, let me know.
Best,
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
@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 again:
Mubsi
December 22, 2025, 1:28pm
6
Hi @Timotheos ,
I’m going to send you a direct message regarding this.
Best,
Mubsi
December 22, 2025, 3:56pm
7
Once Timotheos filled all of the exercises and ran the cell which saves the model needed for grading, the grader worked as expected.
1 Like
TMosh
December 22, 2025, 6:15pm
8
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
TMosh
December 23, 2025, 12:42am
10
What is the detailed feedback from the grader?
Mubsi
December 23, 2025, 7:40am
11
Hi @quantlab ,
Did you run this cell before submitting the assignment for grading?
If so, and the issue remains, let me know.
Best,
I’m having issues with submitting the assignment
The issue has been resolved for me. Turns out that you are not able to submit a partial solution. You need to solve the complete notebook and save the model. Not saving the model at the end was causing the error most probably.
2 Likes
@Benedict09
Always create new topic instead of responding on older resolved threads. you can always link similar topics in your created post.
@Deepti_Prasad
Mubsi
December 23, 2025, 3:23pm
17
Hi @Benedict09 ,
You passed 2 out of 5 tests, which is likely an indication that the grader is glitching.
Try re-submiting a couple more times and see if that helps. Usually, it does.
But if it doesn’t let me know.
Best,
