Accounting entry is created in AP for Realized gain without running GL Revaluation

Hi,

We created a voucher in foreign currency and when the voucher was posted, peoplesoft made the accounting entry in base currency. When the vendor was paid , accounting entry for Realized gain was made by the system in AP module. (There is no revaluation set up in GL) . Does it mean the set up for revaluation exists in AP? What is the navigation for AP revaluation set up? (I am quite familiar with GL Revaluation set up.)

Thanks in Advance

Sudarsan