# Grading fails with NameResolutionError to api-inference.huggingface.co — all correct answers marked wrong

> Source: <https://discuss.huggingface.co/t/grading-fails-with-nameresolutionerror-to-api-inference-huggingface-co-all-correct-answers-marked-wrong/178194#post_1>
> Published: 2026-07-25 02:45:48+00:00

Hi, I’ve been attempting the Code Quiz in Chapter 11 (Fine-Tune Large Language Models) and consistently getting a 0% score despite submitting correct solutions. This has happened across multiple attempts on different days.

The grader appears to depend on a live call to `Qwen/Qwen2.5-Coder-32B-Instruct`

via the HF Inference API for evaluation, and that call is failing with a DNS resolution error. When it fails, it seems to fall back to a strict comparison that marks all answers incorrect regardless of correctness.

Error message (from two separate attempts):

Error checking code:

MaxRetryError(‘HTTPSConnectionPool(host=‘[api-inference.huggingface.co](http://api-inference.huggingface.co)’, port=443):

Max retries exceeded with url: /models/Qwen/Qwen2.5-Coder-32B-Instruct/v1/chat/completions

(Caused by NameResolutionError(“: Failed to resolve ‘[api-inference.huggingface.co](http://api-inference.huggingface.co)’

([Errno -5] No address associated with hostname)”))’

**Request IDs for reference:**