n8n-io/n8n · error · NodeOperationError

Error during parsing of JSON Schema. Please check the schema

Error message

Error during parsing of JSON Schema. Please check the schema and try again.

What it means

Error "Error during parsing of JSON Schema. Please check the schema and try again." thrown in n8n-io/n8n.

Source

Thrown at packages/@n8n/nodes-langchain/nodes/output_parser/OutputParserStructured/OutputParserStructured.node.ts:231

		const jsonSchema =
			schemaType === 'fromJson'
				? generateSchemaFromExample(jsonExample, jsonExampleAllFieldsRequired)
				: jsonParse<JSONSchema7>(inputSchema);

		const zodSchema = convertJsonSchemaToZod<z.ZodSchema<object>>(jsonSchema);
		const nodeVersion = this.getNode().typeVersion;

		const autoFix = this.getNodeParameter('autoFix', itemIndex, false) as boolean;

		let outputParser;
		try {
			outputParser = await N8nStructuredOutputParser.fromZodJsonSchema(
				zodSchema,
				nodeVersion,
				this,
			);
		} catch (error) {
			throw new NodeOperationError(
				this.getNode(),
				'Error during parsing of JSON Schema. Please check the schema and try again.',
			);
		}

		if (!autoFix) {
			return {
				response: outputParser,
			};
		}

		const model = (await this.getInputConnectionData(
			NodeConnectionTypes.AiLanguageModel,
			itemIndex,
		)) as BaseLanguageModel;

		const prompt = this.getNodeParameter('prompt', itemIndex, NAIVE_FIX_PROMPT) as string;

View on GitHub (pinned to 5ac6606e81)

When it happens

Trigger: Thrown at packages/@n8n/nodes-langchain/nodes/output_parser/OutputParserStructured/OutputParserStructured.node.ts:231 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of n8n-io/n8n@5ac6606e81 (2026-08-12). Data as JSON: /api/errors/bac2ecc16be6830c. Report an issue: GitHub.