This configuration variable applies only to the thin client automatic update feature. When the thin client executes, it compares its build number with the value of the TC_REQUIRES_BUILD_NUMBER configuration variable. If the value of this variable does not match the client's build number, the automatic update process is initiated. Set this variable to the thin client build number required by the application. The default value of this variable is "0" (off, false, no).
See Automatic Update Overview for more information about this variable.