Проблемы с автономным открытием файла

#include <WinUser32.mqh>
 
int        ExtHandle=-1;
//+------------------------------------------------------------------+
//| script program start function                                    |
//+------------------------------------------------------------------+
int start()
  {
   int    last_fpos;
   double d_close, last_volume;
   int    hwnd=0,cnt=0;
//---- History header
   int    version=400;
   string c_copyright="Copyright © 2005, komposter";
   string c_symbol=Symbol();
   int    i_period=Period();
   int    i_digits=Digits;
   int    i_unused[13];
//----  
   ExtHandle=FileOpenHistory(c_symbol+i_period+"_all.hst", FILE_BIN|FILE_WRITE);
   if(ExtHandle < 0) return(-1);
//---- write history file header
   FileWriteInteger(ExtHandle, version, LONG_VALUE);
   FileWriteString(ExtHandle, c_copyright, 64);
   FileWriteString(ExtHandle, "EURUSD", 12);
   FileWriteInteger(ExtHandle, i_period, LONG_VALUE);
   FileWriteInteger(ExtHandle, i_digits, LONG_VALUE);
   FileWriteInteger(ExtHandle, 0, LONG_VALUE);       //timesign
   FileWriteInteger(ExtHandle, 0, LONG_VALUE);       //last_sync
   FileWriteArray(ExtHandle, i_unused, 0, 13);
//---- write history file
   int periodseconds = i_period * 60;
   int StartBar = Bars - 1;
   double d_open = Open[StartBar];
   double d_low = Low[StartBar];
   double d_high = High[StartBar];
   double d_volume = Volume[StartBar];
   //---- normalize open time
   int i_time = Time[StartBar]/periodseconds;
   i_time *= periodseconds;
 
//+------------------------------------------------------------------+
//| обработка истории
//+------------------------------------------------------------------+
    int time0;
    for( int i = StartBar - 1; i >= 0; i-- )
    {
        time0 = Time[i];
 
//---- если есть пропущенные бары,
        while ( time0 > i_time + periodseconds && TimeDayOfWeek(i_time) > 0 && TimeDayOfWeek(i_time) < 6 )
        {
//Print( "i = ", i, ", time0 = ", TimeToStr(time0), ", d_open = ", d_open, ", d_low = ", d_low, ", d_high = ", d_high, ", d_close = ", d_close, ", d_volume = ", d_volume );
 
            last_fpos = FileTell(ExtHandle);
            FileWriteInteger(ExtHandle, i_time, LONG_VALUE);
            FileWriteDouble(ExtHandle, d_open, DOUBLE_VALUE);
            FileWriteDouble(ExtHandle, d_low, DOUBLE_VALUE);
            FileWriteDouble(ExtHandle, d_high, DOUBLE_VALUE);
            FileWriteDouble(ExtHandle, d_close, DOUBLE_VALUE);
            FileWriteDouble(ExtHandle, d_volume, DOUBLE_VALUE);
            FileFlush(ExtHandle);
            cnt++;
 
            i_time += periodseconds;
            d_open =  d_close;
            d_low  =  d_close;
            d_high =  d_close;
            d_volume = 1;
 
//Print( "i = ", i, ", time0 = ", TimeToStr(time0), ", d_open = ", d_open, ", d_low = ", d_low, ", d_high = ", d_high, ", d_close = ", d_close, ", d_volume = ", d_volume );
        }
        if ( time0 >= i_time + periodseconds )
        {
            last_fpos = FileTell(ExtHandle);
            FileWriteInteger(ExtHandle, i_time, LONG_VALUE);
            FileWriteDouble(ExtHandle, d_open, DOUBLE_VALUE);
            FileWriteDouble(ExtHandle, d_low, DOUBLE_VALUE);
            FileWriteDouble(ExtHandle, d_high, DOUBLE_VALUE);
            FileWriteDouble(ExtHandle, d_close, DOUBLE_VALUE);
            FileWriteDouble(ExtHandle, d_volume, DOUBLE_VALUE);
            FileFlush(ExtHandle);
            cnt++;
 
            i_time    =    time0 / periodseconds;
            i_time    *=    periodseconds;
            d_open    =    Open[i];
            d_low        =    Low[i];
            d_high    =    High[i];
            d_close    =    Close[i];
            d_volume    =    Volume[i];
        }
    }
   FileFlush(ExtHandle);
   Print(cnt," record(s) written");
 
   return(0);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void deinit()
  {
   if(ExtHandle>=0) { FileClose(ExtHandle); ExtHandle=-1; }
  }
//+------------------------------------------------------------------+

ExtHandle=FileOpenHistory(c_symbol+i_period+"_all.hst", FILE_BIN|FILE_WRITE);

ExtHandle=FileOpenHistory("EURUSD"+i_period+".hst", FILE_BIN|FILE_WRITE);