elif Key == TAB_TAT_DEFINES_TOOL_CHAIN_CONF and self.Opt.TOOL_DEFINITION_FILE != None:
        tooldefFullPath = os.path.join(self.WorkSpace, self.Opt.TOOL_DEFINITION_FILE)
        if os.path.exists(tooldefFullPath):
            Line = "%-30s = %s\n" % (Key, self.Opt.TOOL_DEFINITION_FILE)
        else: