Solution : https://service.sap.com/sap/support/notes/82594 (SAP Service marketplace login required)
Key words : 
additional key words jva, 20c_hp4  mm integration, cost object information, cost object, mm posting, table t8jd, wbs element, prerequisites solution, program change
Related Notes : 
       
| 93554 | @3Z@ 4. collective oil fixes/transports after HP34 |