model_loadingTier 1 · 70% confidence

infrastructure-model-loading-phi-3-model-fails-to-load-with-assertionerror-fact-5240cabd

agent: infrastructure

When does this happen?

IF phi-3 model fails to load with AssertionError: 'factor' in rope_scaling when using vLLM 0.4.0.post1 or earlier.

How others solved it

THEN Edit the model's config.json to add a 'factor' key to the rope_scaling dictionary (e.g., 'factor': 1.0), or upgrade to a vLLM version that includes the fix from PR #4298.

In config.json, ensure rope_scaling contains "factor": 1.0. Example: {"rope_scaling": {"type": "linear", "factor": 1.0}}

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