Index = getNumberOf("stop_orders")-1

function main()
   local counter = 0;
   local key;
   for i=getNumberOf("stop_orders")-1,0,-1 do
      local item = getItem("stop_orders", i)
      if item.sec_code = "SiM6" and item.withdraw_time == 0 then
         key = item.order_num
         counter = counter + 1
         if counter >= 2 then
            message("ERROR",3)
         end
      end
   end
end

 while Index >= 0 do
      Stops = getItem("stop_orders", Index-1)

Stops = {}
Index = 0
i = 0

function main()

   Index = getNumberOf("stop_orders")
   
   while Index >= 0 do
      Stops = getItem("stop_orders", Index)
      if Stops.sec_code = "SiM6" then
         if Stops.withdraw_time == 0 then
            KeyOrder = Stops.order_num
            i = i+1                     --счётчик активных заявок по инструменту
            if i >=2 then
               message("ERROR,3")
            end                     
         end
      end
      Index=Index-1
   end

end