MRP Calculations Incorrect

When I run Request Resolution in GP, I get recommendations to create Purchase Orders for Items that are already on a Purchase Order. That being the case, all of our open purchase orders are being ignored within the MRP calculations.

We have run the Checklinks and Reconcile utilities, Regeneration, and rerun the Requisition Resolution process, but GP still does not recognize that there are Open POs for items in the system and recommend that we create additional POs for items.

Example:

Demand from Open MOs        2,500 Units
Open PO                                     2,500 Units

Net effect                                    0 Units

However, MRP is recommending that a PO for another 2,500 units be created. So we have no problem getting POs created. Our problem is getting system to create POs when appropriate based on Open MO Demand and Open PO Supply.

Any assistance would be greatly appreciated.

Thanks,

Michael