Solution : https://service.sap.com/sap/support/notes/1261247 (SAP Service marketplace login required)
Key words : 
exporting is_subject      = ls_subject                                  iv_ref_guid     = lv_ref_guid                                  iv_ref_kind     = lv_ref_kind                                  iv_profile_type = lv_profile_type                                importing ev_asp_id = lv_asp_id                                              ev_cat_id = lv_cat_id, e-mail response management system [erms] integration - note, exporting                                          iv_source_guid = lv_src_guid                                          iv_target_guid = lv_trgt_guid                                          iv_ref_kind = 'a', exporting                                      iv_source_guid = lv_src_guid                                      iv_target_guid = lv_trgt_guid, transactions -> basic settings -> define transaction types, account interaction record business intelligence, business context notes header information, existing sap crm customer upgrading, locally defined utility class zl_tickettoresquest_util, ic service order business transaction
Related Notes : 
       
| 1408382 | Interaction Center Business Transactions in CRM 7.0 | 
| 759923 | IC WebClient: FAQ Note |