problem with partial voucher match with purchase receipt

Hi,

There is incorrect cost variance calculated when we do a voucher match for a foreign purchase order receipt.

We do a partial voucher match i.e suppose the receipt is of quantity 500 foreign received amount 100000 , will match with quantity 20 and voucher amount 4000 and rest will be open.

The exchange rate if kept same as the receipt exchange rate there is cost variance( AA ledger) booked to the 4332 Dmaai which is equal to the (foreign open amount x exchange rate)

The quantity is consumed in the item ledger before the voucher is matched.

Can you please help in this regard?