kvLogFile = nil
    kvLogFileCnt = 0
    function kvLogOpen()
        if kvLogFileCnt == 0 then
            kvLogFile = io.open(getWorkingFolder().."\\LuaScripts\\kvLog.log", "a+t")
        end
        if kvLogFile then
            kvLogFileCnt = kvLogFileCnt + 1
        end
    end
    
    function kvLogClose()
        if kvLogFile then
            kvLogFileCnt = kvLogFileCnt - 1
            if kvLogFileCnt == 0 then
                kvLogFile:close()
                kvLogFile = nil
            end
        end
    end
    function kvLog(s)
        if kvLogFile ~= nil then 
            kvLogFile:write(getInfoParam("LOCALTIME").. " : " .. s .. "\n")
            kvLogFile:flush()
        end
    end