Grading Error While Submitting the Notebook

I am getting this error saying

Grader Error: Grader feedback not found

I had passed all tests and I am not using any global variables in the notebook

My Lab ID : howjnzvn

Most of the folks listening here cannot look at your notebooks directly. Only the course staff can do that and they are (generally) too busy to hang out here.

That error most likely means that something is damaged in the parts of your notebook structure and metadata that the grader depends on. The first thing to try is to get a clean copy of the notebook and then very carefully “copy/paste” over just your completed code segments and see if that fixes the problem. There are instructions for how to do that on this DLS topic. The same mechanisms should work in all the specializations, since it’s just using Coursera notebook features, but let me know if you can’t see the thread.


I had followed the instruction from the resource you have provided. I have paste the code where it is necessary. Then I submitted the assignment. After, submitting the code the I am not getting the the error as before as “Grading error”. But, now I am getting the below error;

Sorry, I have not actually taken that course yet, so I can’t directly help you if you have a problem with the particular code there.

But it might shed some light to click one of those “Show grader output” links on the right side. Do they give you any more information about what is wrong?

It gives me the syntax error. Here, the notebook does not have any syntax error.

Apparently the grader environment is different than the notebook environment, so just because it works for you when you run it locally, that does not mean it is fully correct.

The types of things that might be an issue for example might be things like mixing spaces and tabs in your indentation. Beyond that, I don’t know what to suggest. As I mentioned, I have not taken NLP Course 3 yet. If you know the names of any of the NLP Mentors, maybe you can try using @ to add them to this thread.