The problem is the $System group. We decided to add them to the $system, but all data members in $System is only writable and cannot have the "Edit Connection". What you can do is to right click on it and drag onto the panel to create a pushbutton or switch. Or you can create a pushbutton and add the $System.logoff to its remote source.
The original purpose of this datamember is for touch panel user who maybe feel difficult to click on small menu. If you want to programmatically control the logoff data member, you can create a pushbutton and connect remote source to logoff, and then connect a timer to the pushbutton by the "Edit Connection".
Ryan Shi
National Instruments
