Risk management via USER EXIT. Update S066 guaranteed order

[jorbor]

I'm trying to use Payment guarantee procedureto populate AOEIW in S066 and avoid orders from being blocked by credit.

I've crearted a Form of payment guarantee with payment method 4 (USER EXIT) and asigned to a Payment guarantee procedure.

Once I use this payment guarantee procedure in a sales order, the system does nothing, the order is bloked by credit.

I can use a routine in OVA8 to avoid credit check, but even there's a Payment guarantee procedure in the order, the value is added to open orders in S066, instead Guaranteed Open orders (AOEIW).

Which code should I use in user exit RVKMPUS2 to perform this?

Thanks.