DS = {};

function main()

   DS.oi, err = CreateDataSource("SPBFUT", "RIM8", 1440,"numtrades");
   while (err == "" or err == nil) and DS.oi:Size() == 0 do sleep(1) end;
   message(tostring(DS.oi:Size()));

end;

main = function()
   class_code = "SPBFUT";
   sec_code = "RIM8";

   ds, Error = CreateDataSource(class_code, sec_code, 0)
   while (Error == "" or Error == nil) and ds:Size() == 0 do sleep(1) end;
   ds:SetEmptyCallback();

   
end;