Exchange Rate Variance Account

We are having a problemwith an invoice in payables module. It is crediting the exchange rate variance account in invoice accounting but is not selecting the right gl code due to which we are not able to generate accounting for this invoice. Can anybody tell me where do we define Exchange Rate Variance account?

Note: If your answer is PO Price Variance account in Financial Options then we have already checked it and it has the right gl code so there definitely is some other place where the aforementioned code is defined.
I can also provide screen shots of the invoice or the distribution of invoice.