n8n-io/n8n · error · Error

Failed to parse CSV file: ${message}

Error message

Failed to parse CSV file: ${message}

What it means

Error "Failed to parse CSV file: ${message}" thrown in n8n-io/n8n.

Source

Thrown at packages/@n8n/ai-workflow-builder.ee/evaluations/cli/csv-prompt-loader.ts:38

}

function sanitizeValue(value: string | undefined) {
	return value?.trim() ?? '';
}

function parseCsv(content: string): ParsedCsvRow[] {
	try {
		const rows = parse(content.replace(/^\ufeff/, ''), {
			columns: false,
			skip_empty_lines: true,
			trim: true,
			relax_column_count: true,
		}) as ParsedCsvRow[];

		return rows.map((row) => row.map((cell) => cell ?? ''));
	} catch (error) {
		const message = error instanceof Error ? error.message : 'Unknown parsing error';
		throw new Error(`Failed to parse CSV file: ${message}`);
	}
}

export function loadTestCasesFromCsv(csvPath: string): TestCase[] {
	const resolvedPath = isAbsolute(csvPath) ? csvPath : resolve(process.cwd(), csvPath);

	if (!existsSync(resolvedPath)) {
		throw new Error(`CSV file not found at ${resolvedPath}`);
	}

	const rows = parseCsv(readFileSync(resolvedPath, 'utf8'));

	if (rows.length === 0) {
		throw new Error('The provided CSV file is empty');
	}

	const hasHeader = isHeaderRow(rows[0]);
	const header = hasHeader ? rows[0] : undefined;

View on GitHub (pinned to 5ac6606e81)

When it happens

Trigger: Thrown at packages/@n8n/ai-workflow-builder.ee/evaluations/cli/csv-prompt-loader.ts:38 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/d7ce7570d430d82c. Report an issue: GitHub.