Solution : https://service.sap.com/sap/support/notes/549993 (SAP Service marketplace login required)
Key words :
\usr\sap\<sapsid>\sys\profile\ start_dvebmgs<instance_number>_<sapvirthostname>, \usr\sap\<sapsid>\sys\exe\run\sapstartsrv, \usr\sap\<sapsid>\sys\exe\run, 'sap service install/uninstall' window enter, 'sap<sapsid>_<instance_number>', sap system service administrator user, sap start profile <sapdisk>, sap system administrator user, sap system id <sapsid>, sap system instance number
Related Notes :
| 484876 | Additional information about upgrading to SAP Web AS 6.20 |