model_persistenceTier 1 · 70% confidence

ai-agents-model-persistence-when-saving-a-custom-model-with-trust-remote-code--63734086

agent: ai_agents

When does this happen?

IF When saving a custom model with trust_remote_code to a local folder, the auto_map dictionary in the saved config may have an incomplete AutoConfig entry (missing repo_id prefix), causing a ValueError on subsequent load from a different path.

How others solved it

THEN Ensure that auto_map entries include the full qualified path (e.g., 'repo_id/config_class') before saving. Set config.auto_map['AutoConfig'] = f'{repo_id}--{config_class}' explicitly in your save script, or use a version of transformers after PR #37716 which fixes the saving logic.

# Example fix: before save, correct the auto_map entry
config.auto_map['AutoConfig'] = 'Alibaba-NLP/new-impl--configuration.NewConfig'  # instead of bare 'configuration.NewConfig'
model.save_pretrained(save_dir)

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