For the mobile data entry (MOB) interface, the following activities must be considered:

1. From the external system a synchronous Remote Function Call to a function module (‘L_PO_READ_MDE‘) in SAP has to request the purchasing data. After the verification of the purchasing data in the external system a goods receipt should be executed for the purchase order (WMMBID01).
2. Either the minimum prerequisites of the WM-WCU (warehouse control unit) interface have to be fulfilled or the IDocs of the SD component have to be linked.