Solution : https://service.sap.com/sap/support/notes/357681 (SAP Service marketplace login required)
Key words : 
single roles inenterprise buyer professional edition, user exits exit_/sapapo/saplcif_g_ep_002, enterprise buyer professional edition release 2, report report interface 0bbp_po_q008, report report interface 0bbp_inv_q008, crm application 'business transaction processing', condition table read sap note 370182, sap component funds management, work breakdown structure element, sapap0/c1 /sapap0/c2
Related Notes : 
       
| 392839 | No display of favorites list for shop with item status 6,7 | 
| 376348 | Contrct documentatn:Changes for EnterpriseBuyer 2.0 | 
| 360142 | Enterprise Buyer 2.0 Installation: Composite Note | 
| 358741 | BBP - R/3 delivery address | 
| 358098 | Delivery contracts with EBP 2.0C | 
| 355763 | |
| 355684 | Additions for upgrade to EBUYER 2.0 / CRM 2.0C | 
| 68366 | Active Availability Control for Cost Centers |