{"record":{"id":"df009126d3a7bd73","repo":"BerriAI/litellm","slug":"output-file-id-is-none-cannot-retrieve-file-conten","errorCode":null,"errorMessage":"Output file id is None cannot retrieve file content","messagePattern":"Output file id is None cannot retrieve file content","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"litellm/batches/batch_utils.py","lineNumber":254,"sourceCode":"    custom_llm_provider: Literal[\"openai\", \"azure\", \"vertex_ai\", \"hosted_vllm\", \"anthropic\"] = \"openai\",\n    litellm_params: dict | None = None,\n) -> bytes:\n    \"\"\"\n    Fetch the batch output file and return its raw JSONL bytes\n\n    Args:\n        batch: The batch object\n        custom_llm_provider: The LLM provider\n        litellm_params: Optional litellm parameters containing credentials (api_key, api_base, etc.)\n                       Required for Azure and other providers that need authentication\n    \"\"\"\n    from litellm.files.main import afile_content\n    from litellm.proxy.openai_files_endpoints.common_utils import (\n        _is_base64_encoded_unified_file_id,\n    )\n\n    if batch.output_file_id is None:\n        raise ValueError(\"Output file id is None cannot retrieve file content\")\n\n    file_id = batch.output_file_id\n    is_base64_unified_file_id: Final = _is_base64_encoded_unified_file_id(file_id)\n    if is_base64_unified_file_id:\n        try:\n            file_id = is_base64_unified_file_id.split(\"llm_output_file_id,\")[1].split(\";\")[0]\n            verbose_logger.debug(\"Extracted LLM output file ID from unified file ID: %s\", file_id)\n        except (IndexError, AttributeError) as e:\n            verbose_logger.error(\n                \"Failed to extract LLM output file ID from unified file ID: %s, error: %s\", batch.output_file_id, e\n            )\n\n    # Build kwargs for afile_content with credentials from litellm_params\n    file_content_kwargs: Final = {\n        \"file_id\": file_id,\n        \"custom_llm_provider\": custom_llm_provider,\n    }\n","sourceCodeStart":236,"sourceCodeEnd":272,"githubUrl":"https://github.com/BerriAI/litellm/blob/6c2dcb801bf2b75c18f1bb24140e7cf57465cc4d/litellm/batches/batch_utils.py#L236-L272","documentation":"ValueError raised by the batches utility that retrieves a batch's output file content when batch.output_file_id is None. OpenAI only populates output_file_id once a batch reaches a terminal state with results; if you try to fetch results before the batch has completed (or for a failed/expired batch), there is no output file to retrieve and LiteLLM fails fast.","triggerScenarios":"Calling litellm.get_batch_output_file_content (or afile_content-based retrieval) on a batch object whose output_file_id is None — typically a batch still in 'in_progress'/'validating'/'finalizing', or one that failed/cancelled/expired without producing output.","commonSituations":"Polling code that checks batch.status != 'completed' incorrectly and fetches too early; a failed batch (check errors_file_id instead); provider responses that omit output_file_id even on completion.","solutions":["Poll until batch.status == 'completed' before retrieving output content.","If the batch failed or was cancelled, read batch.error_file_id / errors instead — output_file_id stays None.","Guard the call: if batch.output_file_id is None: skip/handle."],"exampleFix":"# before\ncontent = await afile_content(batch.output_file_id, ...)\n\n# after\nif batch.output_file_id is None:\n    raise RuntimeError(f\"Batch {batch.id} not completed (status={batch.status}); no output file yet\")\ncontent = await afile_content(batch.output_file_id, ...)","handlingStrategy":"validation","validationCode":"if batch.output_file_id is None:\n    raise RuntimeError(f\"Batch {batch.id} status={batch.status}: no output file available\")","typeGuard":"def batch_has_output(batch) -> bool:\n    return getattr(batch, \"output_file_id\", None) is not None","tryCatchPattern":"try:\n    content = await afile_content(batch.output_file_id, ...)\nexcept ValueError as e:\n    if \"Output file id is None\" in str(e):\n        logger.warning(\"batch %s not ready (status=%s)\", batch.id, batch.status)\n        content = None\n    else:\n        raise","preventionTips":["Gate output retrieval on batch.status == 'completed'.","For failed batches, use error_file_id instead.","Build polling helpers with max attempts and backoff rather than fire-and-forget fetches."],"tags":["batches","openai","state-validation","polling"],"backgroundTag":null,"analyzedSha":"6c2dcb801bf2b75c18f1bb24140e7cf57465cc4d","analyzedAt":"2026-08-15T07:12:03.035Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}