aardio里的timer时钟定时器控件步进事件长时间运行后无错误提示停止是什么原因?

timer.onTimer = function(hwnd,msg,id,tick){



    try{

        timer.disable();//执行步进功能时先停止时钟

        winform.staticTime.text = timeHead();

        winform.editLog.print(timeHead2(),"onTimer");        

        timer.enable();//执行步进功能完成后再继续启用时钟

    }catch(e){

        winform.editLog.print(timeHead2(),"onTimer,trycatch,e:",e);

    }

    

}