n8n-io/n8n · error · Error

Attachment exceeds maximum size of ${formatMB(MAX_DECODED_SI

Error message

Attachment exceeds maximum size of ${formatMB(MAX_DECODED_SIZE_BYTES)} (got ${formatMB(actualBytes)})

What it means

Error "Attachment exceeds maximum size of ${formatMB(MAX_DECODED_SIZE_BYTES)} (got ${formatMB(actualBytes)})" thrown in n8n-io/n8n.

Source

Thrown at packages/@n8n/instance-ai/src/parsers/docx-parser.ts:20

import {
	MAX_DECODED_SIZE_BYTES,
	MAX_RESULT_CHARS,
	formatSizeLimitMessage,
	type AttachmentInfo,
} from './structured-file-parser';

export interface DocxExtractionResult {
	text: string;
	truncated: boolean;
}

/**
 * Extracts plain text from a `.docx` (Office Open XML) attachment using `mammoth`.
 */
export async function extractDocxText(attachment: AttachmentInfo): Promise<DocxExtractionResult> {
	const decoded = Buffer.from(attachment.data, 'base64');
	if (decoded.length > MAX_DECODED_SIZE_BYTES) {
		throw new Error(formatSizeLimitMessage(decoded.length));
	}
	assertOoxmlWithinBounds(decoded, attachment.fileName);

	const mammoth = await import('mammoth');
	const extractRawText = mammoth.extractRawText ?? mammoth.default?.extractRawText;
	if (typeof extractRawText !== 'function') {
		throw new Error('mammoth.extractRawText is not available');
	}

	let raw: { value: string };
	try {
		raw = await extractRawText({ buffer: decoded });
	} catch (error) {
		const message = error instanceof Error ? error.message : 'unknown error';
		throw new Error(`Failed to parse docx "${attachment.fileName}": ${message}`);
	}

	const text = raw.value?.trim() ?? '';

View on GitHub (pinned to 5ac6606e81)

When it happens

Trigger: Thrown at packages/@n8n/instance-ai/src/parsers/docx-parser.ts:20 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/28c7c176b57e45dc. Report an issue: GitHub.