n8n-io/n8n · error · NodeOperationError

Invalid document at index ${invalidIndex}

Error message

Invalid document at index ${invalidIndex}

What it means

Error "Invalid document at index ${invalidIndex}" thrown in n8n-io/n8n.

Source

Thrown at packages/@n8n/ai-utilities/src/utils/embeddings-input-validation.ts:44

 *
 * @param documents - The documents array to validate
 * @param node - The node for error context
 * @returns The validated documents array
 * @throws NodeOperationError if documents is not an array or contains invalid entries
 */
export function validateEmbedDocumentsInput(documents: unknown, node: INode): string[] {
	if (!Array.isArray(documents)) {
		throw new NodeOperationError(node, 'Documents must be an array', {
			description: 'Expected an array of strings to embed.',
		});
	}

	const invalidIndex = documents.findIndex(
		(doc) => doc === undefined || doc === null || doc === '',
	);

	if (invalidIndex !== -1) {
		throw new NodeOperationError(node, `Invalid document at index ${invalidIndex}`, {
			description: `Document at index ${invalidIndex} is empty or undefined. All documents must be non-empty strings.`,
		});
	}

	return documents;
}

View on GitHub (pinned to 5ac6606e81)

When it happens

Trigger: Thrown at packages/@n8n/ai-utilities/src/utils/embeddings-input-validation.ts:44 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/b7b9458ef321011d. Report an issue: GitHub.