Solution : https://service.sap.com/sap/support/notes/770626 (SAP Service marketplace login required)
Key words : 
time  call function 'rfc_connection_close'    exporting      destination          = ', call function 'bapi_transaction_commit'    destination ', call function 'bapi_alm_order_maintain'    destination ', system checks table gt_pmsdo, initial global internal tables, initial internal tables, initial roll area, dump save_error occurs, final object number, temporary object number
Related Notes : 
       
| 750606 | Actual costs are not updated in PMCO | 
| 708508 | Downgrade BAPI_ALM_ORDER_MAINTAIN -> errors |