InstallShield overwrites any existing file with the same name.
To protect against loss of data, save a copy of the %SYBASE%\SYBASE.BAT file before installing SDK and Open Server.
WARNING! Installing SDK 12.5.1 or Open Server 12.5.1 on the same machine as any ASE release prior to 12.5.1 prevents the earlier version of the server from booting.
