n8n-io/n8n · error · ExpressionExtensionError

cannot convert to float, expected . as decimal separator

Error message

cannot convert to float, expected . as decimal separator

What it means

Error "cannot convert to float, expected . as decimal separator" thrown in n8n-io/n8n.

Source

Thrown at packages/@n8n/expression-runtime/src/extensions/string-extensions.ts:244

		return encodeURI(value.toString());
	}
	return encodeURIComponent(value.toString());
}

function toInt(value: string, extraArgs: Array<number | undefined>) {
	const [radix] = extraArgs;
	const int = parseInt(value.replace(CURRENCY_REGEXP, ''), radix);

	if (isNaN(int)) {
		throw new ExpressionExtensionError('cannot convert to integer');
	}

	return int;
}

function toFloat(value: string) {
	if (value.includes(',')) {
		throw new ExpressionExtensionError('cannot convert to float, expected . as decimal separator');
	}

	const float = parseFloat(value.replace(CURRENCY_REGEXP, ''));

	if (isNaN(float)) {
		throw new ExpressionExtensionError('cannot convert to float');
	}

	return float;
}

function toNumber(value: string) {
	const num = Number(value.replace(CURRENCY_REGEXP, ''));

	if (isNaN(num)) {
		throw new ExpressionExtensionError('cannot convert to number');
	}

View on GitHub (pinned to 5ac6606e81)

When it happens

Trigger: Thrown at packages/@n8n/expression-runtime/src/extensions/string-extensions.ts:244 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/9f5110ab91cb65c5. Report an issue: GitHub.