F110- not able to clear the debit and credit entry with the same reference

Hi,

I am not able to clear the debit and credit entry with the same reference in F110 even after having the payment terms as immediate payment, payment method is maintained in document no and vendor master data. Both debit and credit entry is appearing in FBL1N as an open item but it is not appearing in F110.

In Log message appear as 8 days grace period is existing whereas as payment term is just 0001- immediate payment.

Kindly advice me what could be wrong.

Thanks,

Manya.