Metadata Being Added to CSV During Upload ¶
By: shubham25 on April 6, 2025, 11:16 p.m.
Dear HC18 Challenge Administrators, I'm writing regarding a technical issue I'm encountering while trying to submit my solution to the HC18 Fetal Head Circumference Challenge. Despite multiple attempts with different file preparation methods, my submissions are consistently failing with the same error. Issue Description When I upload my CSV submission file, the system appears to add metadata to the file and then rejects it for containing that same metadata as "extra columns." I've tried numerous approaches to create a clean CSV file, including:
Direct output from my algorithm Manual creation in Excel Multiple Python scripts with different CSV writing methods Verifying the file content in text editors before upload
Error Message All submissions fail with variations of this error: Copyevalutils.exceptions.ValidationError: We only expected to find the columns ('filename', 'center_x_mm', 'center_y_mm', 'semi_axes_a_mm', 'semi_axes_b_mm', 'angle_rad'). However, we also found that extra columns were defined: ['[{"interface": {"title": "Predictions CSV File"', 'description: "Set of predictions for a challenge evaluation"', 'slug: "predictions-csv-file"', 'kind: "CSV file"', 'pk: 4', 'default_value: null', 'super_kind: "File"', 'relative_path: "predictions.csv"', 'overlay_segments: []', 'look_up_table: null}', 'value: null', 'file: "https://grand-challenge.org/media/evaluation/265/submissions/125657/[...]"', 'image: null', 'pk: [...]'}]']. The JSON metadata being detected appears to be added by the platform itself during the upload process, as it references the Grand Challenge URL structure. Request for Assistance Could you please:
Advise on how to submit my solution without triggering this error Alternatively, consider accepting my submission manually or fixing the validation process Let me know if other participants have experienced similar issues
My submission file is a straightforward CSV with exactly 6 columns (filename, center_x_mm, center_y_mm, semi_axes_a_mm, semi_axes_b_mm, angle_rad) and 335 data rows as required. I'd be happy to provide any additional information or files that might help resolve this issue.
