Solution : https://service.sap.com/sap/support/notes/426447 (SAP Service marketplace login required)
Key words :
additional key words product configuration, source code corrections, configurable product, product catalog, default configuration, configuration flag, item configuration, shopping basket, contract reference, api crm_isa_basket_changeitems
Related Notes :
424198 | SAPKU30002: Support Package 2 for EBP 3.0/CRM 3.0 |