Solution : https://service.sap.com/sap/support/notes/749977 (SAP Service marketplace login required)
Key words :
terms transport management systemrfcremote function call reason, type flagthe tms_ci_add_route function module requires, prerequisites program change due, type tmscroute-sysnam optional, function extras -> tmsadm destinations, tms_ci_check_user_pwd function module, tmsc_i function group, works nowthis setting, system route effect, tmsadm destinations