CXXMAINT (Maintain Directory) › CXXMAINT ALTER OPTION2= (Activating Other Features) › CXXMAINT ALTER OPTION2=sumode (Single User Mode)
By default, when you convert a Version 11.0 (also known as r11) CXX to a Version 12.0 CXX, use of Single User mode is blocked, even if secured Single User is allowed.
