Solution : https://service.sap.com/sap/support/notes/972762 (SAP Service marketplace login required)
Key words : 
620 patch        23its 640 kernel patch 148its 700 kernel patch 77this note, exact support package numberis, kernel patch, front-end services, terms cl_gui_frontend_services reason, front-end computer, determining environment variablesand, /3 support package, note 563161, front-enduser
Related Notes : 
       
| 1065516 | ITS up/Down: frontend services raise exception CNTL_ERROR | 
| 1027861 | ITS Up/Down: Coredump during Clipboard Export | 
| 1027013 | ITS up/Down: environment variable name is case sensitive | 
| 563161 | SAP GUI, SAP ITS & SAP IGS patches on Service Marketplace |