После вызова ds:Close() не работает callback при перезаказе данных

stopped = false

ClassCode = "TQBR"
SecCode = "GAZP"


function OnStop(row)
    stopped = true
end

function main()
    
    ds = CreateDataSource("QJSIM", "GAZP", INTERVAL_M1)
    ds: SetUpdateCallback (cb)
    ds: Close()

    ds = CreateDataSource("QJSIM", "GAZP", INTERVAL_M1)
    ds: SetUpdateCallback (cb)
        
    while not stopped do 

    end 

end

function cb( index )
    local t = ds:T(index)
    local _str = string.format("#%d of %d\t%.4f\t%.4f\t%.4f\t%.4f\t%.4f %02d.%02d.%04d %02d:%02d:%02d.%04d\n",
    index, ds:Size(),ds:O(index), ds:H(index), ds:L(index), 
    ds:C(index), ds:V(index),
    t.day, t.month, t.year, t.hour, t.min, t.sec, t.ms)
    message(_str)
    end