nopSolutions/nopCommerce · error · NopException

Exchange rate not found for currency [{targetCurrencyCode.Na

Error message

Exchange rate not found for currency [{targetCurrencyCode.Name}]

What it means

Thrown by ConvertFromPrimaryExchangeRateCurrencyAsync as a NopException when targetCurrencyCode.Rate equals decimal.Zero. The conversion multiplies by the target's Rate; a zero rate silently zeroes out the converted amount, so the guard rejects it. Mirror of error 36 for the reverse direction.

Source

Thrown at src/Libraries/Nop.Services/Directory/CurrencyService.cs:280

    /// <param name="amount">Amount</param>
    /// <param name="targetCurrencyCode">Target currency code</param>
    /// <returns>
    /// A task that represents the asynchronous operation
    /// The task result contains the converted value
    /// </returns>
    public virtual async Task<decimal> ConvertFromPrimaryExchangeRateCurrencyAsync(decimal amount, Currency targetCurrencyCode)
    {
        ArgumentNullException.ThrowIfNull(targetCurrencyCode);

        var primaryExchangeRateCurrency = await GetCurrencyByIdAsync(_currencySettings.PrimaryExchangeRateCurrencyId) ?? throw new Exception("Primary exchange rate currency cannot be loaded");

        var result = amount;
        if (result == decimal.Zero || targetCurrencyCode.Id == primaryExchangeRateCurrency.Id)
            return result;

        var exchangeRate = targetCurrencyCode.Rate;
        if (exchangeRate == decimal.Zero)
            throw new NopException($"Exchange rate not found for currency [{targetCurrencyCode.Name}]");
        result *= exchangeRate;

        return result;
    }

    #endregion

    #endregion
}

View on GitHub (pinned to 64bdf2ff08)

Solutions

1. Set a non-zero Rate for the target currency in Admin > Configuration > Currencies.
2. Guard: validate targetCurrency.Rate > 0 before converting.
3. Run a live-rate refresh to repopulate rates.

Example fix

// before
var value = await _currencyService.ConvertFromPrimaryExchangeRateCurrencyAsync(amount, targetCurrency);

// after
if (targetCurrency.Rate == decimal.Zero)
    throw new InvalidOperationException($"Currency '{targetCurrency.Name}' has no exchange rate set.");
var value = await _currencyService.ConvertFromPrimaryExchangeRateCurrencyAsync(amount, targetCurrency);

if (targetCurrency.Rate == decimal.Zero)
    throw new InvalidOperationException($"Currency '{targetCurrency.Name}' has no rate.");

static bool HasRate(Currency c) => c is not null && c.Rate != decimal.Zero;

try { await _currencyService.ConvertFromPrimaryExchangeRateCurrencyAsync(amount, tgt); }
catch (NopException ex) when (ex.Message.Contains("Exchange rate not found"))
{ _logger.LogWarning(ex, "Missing rate; skipping conversion."); }

When it happens

Trigger: Calling ConvertFromPrimaryExchangeRateCurrencyAsync with a target Currency whose Rate is 0. Triggers only when target differs from the primary currency and amount is non-zero.

Common situations: Target currency added without a rate; rate cleared/reset by admin; import with Rate=0.

Related errors

• Exchange rate not found for currency [{sourceCurrencyCode.Na
• Active exchange rate provider cannot be loaded
• Primary exchange rate currency is not set
• Primary exchange rate currency cannot be loaded
• Exchange ratio not set for dimension [{targetMeasureDimensio

AI-assisted analysis of nopSolutions/nopCommerce@64bdf2ff08 (2026-08-13). Data as JSON: /api/errors/be9bfbaca8279b88. Report an issue: GitHub.