Solution : https://service.sap.com/sap/support/notes/459199 (SAP Service marketplace login required)
Key words : 
individual changed datarecords mass updates, leading system generates bdoc messages, sap service marketplace http, sap service marketplace enter, field sales / mobile scenarios, automatically generated events, ther/3 backend system, euro currency conversion, local currency changeover, start module conntrans
Related Notes : 
       
| 442478 | Installation of qRFC Version 6.20.043 | 
| 389805 | Collective note for the Euro changeover with CRM | 
| 332677 | Rebuilding fragmented indexes | 
| 74141 | Resource Management for tRFC and aRFC |