Issues with Material reservation done using API INV_RESERVATION_PUB.Create_Reservation

Hi guys

We have a business practise which in due issue materials to customer against a zero value document (We call it as delivery note transaction). We have a customized application for this purpose, and the application is using " INV_RESERVATION_PUB.Create_Reservation" API

/*Sample Code*/

l_rsv_rec.organization_id := itm.organization_id;

l_rsv_rec.inventory_item_id := itm.inventory_item_id;

l_rsv_rec.requirement_date := SYSDATE + 3;

l_rsv_rec.demand_source_type_id :=

INV_RESERVATION_GLOBAL.G_SOURCE_TYPE_INV;

l_rsv_rec.supply_source_type_id :=

INV_RESERVATION_GLOBAL.G_SOURCE_TYPE_INV;

l_rsv_rec