Solution : https://service.sap.com/sap/support/notes/850409 (SAP Service marketplace login required)
Key words : 
issues error message bapi 001, attached advance corrections, message bapi 003, system issues, program error, message class, message number, purchase order, order instance, terms purchaseorder
Related Notes : 
       
| 855514 | Current Release Restrictions for DBM 500 for Ramp Up | 
| 852091 | Installation of DBM 500 on SAP ECC 500 |