Solution : https://service.sap.com/sap/support/notes/91355 (SAP Service marketplace login required)
Key words : 
additional key words 20c_hp4    20d_hp1    balance carry forward, wrong carry forward values, balance carry forward, updates values, prerequisites solution, program change
Related Notes : 
       
| 93554 | @3Z@ 4. collective oil fixes/transports after HP34 |