Error:Value Exceeds Tolerance

Match Voucher To Open Receipt -[Voucher Match]

When i try to process an invoice there is an error i never seen before that says the value exceeds the tolerance, but it is not true because the PO amount is the same that the total on the invoice so there is not even a remaining or any difference between them.

I have checked in the tolerance rules and set up it looks fine .(F4322)

Please let me know any solution.

Thank you