Solution : https://service.sap.com/sap/support/notes/604989 (SAP Service marketplace login required)
Key words : 
project stock', -valuated stock', terms besta, bapi reason, besta field, solution implement, statuses ', prerequisites, interprets
Related Notes : 
       
| 634869 | SAPKU40001: Support Package 01 for CRM 4.0 | 
| 607000 | Required notes for PS-BAPIs |