不能初始化原因代码

//+------------------------------------------------------------------+
//| 获得文本描述                                                       |
//+------------------------------------------------------------------+
string getUninitReasonText(int reasonCode)
  {
   string text="";
//---
   switch(reasonCode)
     {
      case REASON_ACCOUNT:
         text="Account was changed";break;
      case REASON_CHARTCHANGE:
         text="Symbol or timeframe was changed";break;
      case REASON_CHARTCLOSE:
         text="Chart was closed";break;
      case REASON_PARAMETERS:
         text="Input-parameter was changed";break;
      case REASON_RECOMPILE:
         text="Program "+__FILE__+" was recompiled";break;
      case REASON_REMOVE:
         text="Program "+__FILE__+" was removed from chart";break;
      case REASON_TEMPLATE:
         text="New template was applied to chart";break;
      default:text="Another reason";
     }
//---
   return text;
  }
//+------------------------------------------------------------------+
//| 专家无法初始化函数                                                  |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//--- 获得无法初始化原因代码的第一种方法 
   Print(__FUNCTION__,"_Uninitalization reason code = ",reason);
//--- 获得无法初始化原因代码的第二种方法
   Print(__FUNCTION__,"_UninitReason = ",getUninitReasonText(_UninitReason));
  }