Solution : https://service.sap.com/sap/support/notes/581576 (SAP Service marketplace login required)
Key words : 
change history date              short descriptionjul/03/2006     text revisionnov/06/2006     revision 1, component bc-cu-tol, terms ehs27b46cscc1scu0 reason, prevent existing settings, cross-client objects, object list eh&, call transaction scu0, change history1, object list ehs_comm22, cross-client customizing
Related Notes : 
       
| 393855 | Installing SAP EH&S 2.7B/4.6C |