C1 W1 Assignment - Grading Failed

After I submit the assignment, it occurs an error - Grading Failed.

  • Grader Error: Grader feedback not found

Visit the Discussion forum to see if your peers are experiencing or have found resolutions for similar errors. If the error isn’t resolved in 24 hours, please reach out to Coursera through our Help Center.

Attached are the screencaps of submitting page and the notebook content which is all passed


One possibility is that there is something damaged about the structure of your notebook that the grader depends on. In order to eliminate that possibility, my suggestion would be to get a clean copy and then very carefully “copy/paste” over just your solution code from the “YOUR CODE HERE” sections. Then try submitting again.

Here’s a thread from DLS that explains how to get a clean copy. The material is not DLS specific.

will try it later, thank you


At the start of the notebook there’s:

**Important Note on Submission to the AutoGrader**

Before submitting your assignment to the AutoGrader, please make sure you are not doing the following:

1. You have not added any extra print statement(s) in the assignment.
2. You have not added any extra code cell(s) in the assignment.
3. You have not changed any of the function parameters.
4. You are not using any global variables inside your graded exercises. Unless specifically instructed to do so, please refrain from it and use the local variables instead.
5. You are not changing the assignment code where it is not required, like creating extra variables.

If you do any of the following, you will get something like, Grader not found (or similarly unexpected) error upon submitting your assignment. Before asking for help/debugging the errors in your assignment, check for these first. If this is the case, and you don't remember the changes you have made, you can get a fresh copy of the assignment by following these instructions.

This clearly mentions if you do any of the listed things you will run into Grader not found error.

Please make sure you are not doing any of these listed things.


1 Like