Pls help me !

Before,my schedule object for AHU run normally. But now, some objects for schedule point in error status. i can't control or make schedule for AHU. I try to make a new schedule but can't. Other objects in controller ( b3xxx) are normal, it occurs with schedule object. My system include : bCX1(4040)+ b3xxx. Anybody knows this problem, pls help me ???