n8n-io/n8n · error · Error

Failed to parse workflow code after 3 consecutive attempts.

Error message

Failed to parse workflow code after 3 consecutive attempts.

What it means

Error "Failed to parse workflow code after 3 consecutive attempts." thrown in n8n-io/n8n.

Source

Thrown at packages/@n8n/ai-workflow-builder.ee/src/code-builder/code-builder-agent.ts:539

		} catch (error) {
			await parentRunManager?.handleChainError(error);
			throw error;
		}

		return {
			workflow: state.workflow,
			parseDuration: state.parseDuration,
			sourceCode: state.sourceCode,
			iteration: state.iteration,
		};
	}

	/**
	 * Check if we've hit the consecutive parse error limit
	 */
	private checkConsecutiveParseErrors(count: number): void {
		if (count >= 3) {
			throw new Error('Failed to parse workflow code after 3 consecutive attempts.');
		}
	}

	/**
	 * Process a single iteration of the agentic loop
	 */
	private async *processIteration(params: {
		llmResult: { hasToolCalls: boolean; response: AIMessage };
		messages: BaseMessage[];
		currentWorkflow?: WorkflowJSON;
		textEditorEnabled: boolean;
		textEditorHandler?: TextEditorHandler;
		textEditorToolHandler?: TextEditorToolHandler;
		state: AgenticLoopState;
	}): AsyncGenerator<StreamOutput, { shouldBreak: boolean }, unknown> {
		const {
			llmResult,
			messages,

View on GitHub (pinned to 5ac6606e81)

When it happens

Trigger: Thrown at packages/@n8n/ai-workflow-builder.ee/src/code-builder/code-builder-agent.ts:539 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of n8n-io/n8n@5ac6606e81 (2026-08-12). Data as JSON: /api/errors/bd329d5cacbdf388. Report an issue: GitHub.