Solution : https://service.sap.com/sap/support/notes/580235 (SAP Service marketplace login required)
Key words : 
type            optional iv_header_guid     type      crmt_object_guid iv_object_guid     type      crmt_object_guid iv_attribut        type      crmt_event_attribut iv_strval_old      type, bus2000112 bus2000114 bus2000115 bus2000121            select 'perform function, attached source code corrections, component type prct_attr_name_value_t, type/object/event', prior support package level, iv_strval_new      type, function group crm_pricing_ec, current ipc patch, bus2000111 execution time
Related Notes : 
       
| 625074 | Terms of payment determination on item level II | 
| 602118 | GetPricingItemInfo: NullPointerException | 
| 599927 | SXE log error: SXEInconsistentException | 
| 595772 | Return container in IPC user exits | 
| 530835 | IPC Support Packages for CRM 3.0, CRM 3.1 and CRM 4.0 | 
| 486061 | How to get patches for CRM Internet Pricing Configurator |