Solution : https://service.sap.com/sap/support/notes/592874 (SAP Service marketplace login required)
Key words : 
check navigatetranaction spro -> sap reference imgsap implementation guide, symptom opportunity item  dataexchange - matnr filling, sap crm release, ------->define output format, lexicographic setting flag, fix enclosed alongwith, -------->  customer relationship management, parameter settings prd_leadingzeors_active, functional enhancements project, opportunity management
Related Notes : 
       
| 629487 | CRM 3.0 / CRM 3.1: Functional Enhancements |