{"record":{"id":"6d19892fd7f6f3aa","repo":"huggingface/smolagents","slug":"error-in-generating-model-output-e","errorCode":null,"errorMessage":"Error in generating model output:\n{e}","messagePattern":"Error in generating model output:\n(.+?)","errorType":"exception","errorClass":"AgentGenerationError","httpStatus":null,"severity":"error","filePath":"src/smolagents/agents.py","lineNumber":1700,"sourceCode":"                memory_step.model_output_message = chat_message\n                output_text = chat_message.content\n                self.logger.log_markdown(\n                    content=output_text or \"\",\n                    title=\"Output message of the LLM:\",\n                    level=LogLevel.DEBUG,\n                )\n\n            if not self._use_structured_outputs_internally:\n                # This adds the end code sequence (i.e. the closing code block tag) to the history.\n                # This will nudge subsequent LLM calls to finish with this end code sequence, thus efficiently stopping generation.\n                if output_text and not output_text.strip().endswith(self.code_block_tags[1]):\n                    output_text += self.code_block_tags[1]\n                    memory_step.model_output_message.content = output_text\n\n            memory_step.token_usage = chat_message.token_usage\n            memory_step.model_output = output_text\n        except Exception as e:\n            raise AgentGenerationError(f\"Error in generating model output:\\n{e}\", self.logger) from e\n\n        ### Parse output ###\n        try:\n            if self._use_structured_outputs_internally:\n                code_action = json.loads(output_text)[\"code\"]\n                code_action = extract_code_from_text(code_action, self.code_block_tags) or code_action\n            else:\n                code_action = parse_code_blobs(output_text, self.code_block_tags)\n            code_action = fix_final_answer_code(code_action)\n            memory_step.code_action = code_action\n        except Exception as e:\n            error_msg = f\"Error in code parsing:\\n{e}\\nMake sure to provide correct code blobs.\"\n            raise AgentParsingError(error_msg, self.logger)\n\n        tool_call = ToolCall(\n            name=\"python_interpreter\",\n            arguments=code_action,\n            id=f\"call_{len(self.memory.steps)}\",","sourceCodeStart":1682,"sourceCodeEnd":1718,"githubUrl":"https://github.com/huggingface/smolagents/blob/30bb1161095dbae2271e6bc3cc4c219cc3897a57/src/smolagents/agents.py#L1682-L1718","documentation":"CodeAgent._step_stream wraps any exception from the model's generation call (which produces the code-action text) in AgentGenerationError. The chained cause carries the real failure: provider auth/rate-limit errors, network issues, or malformed provider responses.","triggerScenarios":"agent.run()/step() with a CodeAgent where model.generate() raises mid-run — invalid API key, 429/5xx from the provider, timeout, or response schema mismatch.","commonSituations":"Long autonomous runs hitting token limits; expired credentials; flaky network to the LLM provider; provider API contract changes across library versions.","solutions":["Read the chained exception (from e) to find the underlying provider error and fix it (key, quota, base_url).","Add retry with backoff around agent.run for transient 429/5xx errors.","Pin compatible smolagents/provider SDK versions if the cause is response parsing."],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"from smolagents.exceptions import AgentGenerationError\n\ntry:\n    result = agent.run(task)\nexcept AgentGenerationError as e:\n    if isinstance(e.__cause__, (ConnectionError, TimeoutError)):\n        time.sleep(10)\n        result = agent.run(task)\n    else:\n        raise","preventionTips":["Verify API keys and quota before long CodeAgent runs.","Add retry with backoff around run() for transient provider failures.","Always inspect e.__cause__ to separate provider errors from agent logic."],"tags":["smolagents","codeagent","llm-provider","generation-failure"],"backgroundTag":"llm-api-request-failed","analyzedSha":"30bb1161095dbae2271e6bc3cc4c219cc3897a57","analyzedAt":"2026-08-28T18:52:54.169Z","schemaVersion":2},"datasetVersion":"2026-08-28T21:17:43.275Z"}