MQL5 HistoryDealGetTicket(index) error with code 4755

[Giorgi Gachechiladze]

HistorySelect(0,TimeCurrent());

   for(int i =0;i<HistoryDealsTotal();i++)

   {

      ulong ticket = HistoryDealGetTicket(i);

      Print(" i = " +i + " ticket = " + ticket+" total = "+HistoryDealsTotal());

      int err = GetLastError();

      Print(err);

      

      

   }

this is my EA's little code which doesn't works. I have no idea why that can't select Deals. On tester it works fine,but when i launch it on Demo Account occurs 4755 error.

[lippmaje]

Did you check the ticket value and did you reset last error?