SAP IV 3 Way Match SAP Code

All,

We are having an issue in our test systems where:

Because we use GR based IV for our PO’s we assumed

standard invoice verification will do a 3-way match between GR/IR/PO price

to determine if IR should block. Currently we are seeing IRs are only

getting blocked when IR  > PO price, and are free for payment when PO > IR > GR for unit price when they should be getting blocked.

Configuration looks correct in our system so next step is to debug so does anyone know where the code for these checks are located i.e. program names, function modules etc.?

Thanks,

Frank