Problem with the autograder

Course Q&A Deep Learning Specialization Convolutional Neural Networks
1

Please I passed all the test in the Notebook, but when I submit my work the autograder signals a problem :

[ValidateApp | INFO] Validating ‘/home/jovyan/work/submitted/courseraLearner/W1A2/Convolution_model_Application.ipynb’
[ValidateApp | ERROR] Traceback (most recent call last):
File “/opt/conda/lib/python3.7/site-packages/nbgrader/preprocessors/checkcellmetadata.py”, line 11, in preprocess
MetadataValidator().validate_nb(nb)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/nbgraderformat/v3.py”, line 107, in validate_nb
raise ValidationError(“Duplicate grade id: {}”.format(grade_id))
jsonschema.exceptions.ValidationError: Duplicate grade id: cell-45d22e92042174c9

[ValidateApp | ERROR] Notebook failed to validate; the nbgrader metadata may be corrupted.
[ValidateApp | ERROR] Traceback (most recent call last):
File “/opt/conda/lib/python3.7/site-packages/nbgrader/apps/validateapp.py”, line 72, in start
validator.validate_and_print(filename)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/validator.py”, line 340, in validate_and_print
results = self.validate(filename)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/validator.py”, line 311, in validate
nb = self._preprocess(nb)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/validator.py”, line 290, in _preprocess
nb, resources = pp.preprocess(nb, resources)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/preprocessors/checkcellmetadata.py”, line 16, in preprocess
raise ValidationError(msg)
jsonschema.exceptions.ValidationError: Notebook failed to validate; the nbgrader metadata may be corrupted.

[ValidateApp | ERROR] nbgrader encountered a fatal error while trying to validate ‘submitted/courseraLearner/W1A2/Convolution_model_Application.ipynb’

2

Hey @tsopgniduhamel, please have no doubts in the autograder, it is functioning properly.

As you can see from output, it is telling you that the metadata is corrupted. I came across this exact issue with another learner. They had accidentally changed some code in the assignment which they shouldn’t have had. I suspect similar has happened with you.

Kindly get a fresh copy of the assignment and fill it with your solutions. Instructions to get a fresh copy: Coursera | Online Courses & Credentials From Top Educators. Join for Free | Coursera

Let me know how it goes.