Solution : https://service.sap.com/sap/support/notes/41353 (SAP Service marketplace login required)
Key words : 
solution source code correction, additional key words arrangements, error message emn030, prerequisites program error, volume rebate arrangement, create arrangements, arrangement maintenance, subsequent settlement, purchasing group, purchasing group &
Related Notes : 
       
| 40147 | Collective note: Subsequent settlement (Purch.) Release 3.0 |