General Variables #101-199 should be cleared (Set to Null) when the controller is restarted; Correct?  I have several programs that use the same variables but they do not seem to be clearing after a reboot.  Is there a way to force them to reset without a reboot?  Alternatively(Preferred) is there a line of code or command that I can add to my programs at the beginning to ensure they are cleared before the program runs and new variable values are defined/declared?