Solution : https://service.sap.com/sap/support/notes/417576 (SAP Service marketplace login required)
Key words : 
reference type  optional  pass valuexnoquantity     type        noquantity, additional key words vprs, attached source code corrections, add import parameter xnoquantity, component type noquantity, add component noquantity, -party business transaction, termination compute_bcd_overflow occurs, correction report sdvprsupdate, blanket purchase orders
Related Notes : 
       
| 428794 | Act. ingr. mngmnt/steel tradng:Incorr 3rd prty billng status |