All USD sales return Transactions needing Forex Gain / loss AAI

Hi,

We are processing inter company sales return orders (Not using order type CO but using doc type SO with negative quantity to denote credit orders). Both the companies involved in return process has base/ transaction currency defined as USD. In F4211 also all the amounts are in USD still when applying receipts, the System is giving error for Forex Gain / Loss.

Error is gone after  setting up  RG/RL AAIs  but no amount was posted in forex gain loss account (May be since all transaction amounts are in USD).

Please advise is there any setup i need to check which is forcing the system to look for Forex Gain /Loss AAIs for a transaction is USD. Is there any way to stop this error (other than setting RG/RL AAIs).