Payment accounting is incorrect for a payment done for an invoice with WHT lines

Hi ,

We are working on Oracle R12.1.2 version.

We are facing the issue, "Payment accounting is incorrect for a payment done for an invoice with WHT lines".

The AP invoice accounting has been done correctly. However the payment accounting displays the amount as whole (not deducted the AWT line amount) invoice amount.

It results into AP GL mismatch.

Invoice INV_001

Invoice Amount    $120.00

AWT line Amount $20.00

Amoung Paid       $100.00

Payment Amount $100.00

Invoice Accounting done for  $100.00  (ITEM $120 + AWT - $20 )

Payment Accounting done for $120.00

Appreciate your help in advance.

Regards

Karthik