Перезагрузка не помогает

[pyanyj_shashlyk 0]

modem = peripheral.find("modem")
trans = 15
modem.open(11)
function chest_chk(side)
    local tableN = {}
    local chest = peripheral.wrap(side) 
    for slot, item in pairs(chest.list()) do
        local tabler = string.format("%s %s", item.name, item.count)
        table.insert(tableN,slot,tabler)
        sot = slot
    end
    local size = 54 - sot
    table.insert(tableN, sot + 1, size)
    return tableN
    end
local event, side, channel, replyChannel, message, distance
repeat
    event, side, channel, replyChannel, message, distance = os.pullEvent("modem_message")
until channel == 11
if message == "Update" then
    turtle.forward()
    for i = 0, 13, 1 do
        turtle.forward()
        chest_chk("left")
        chest_chk("right")
        os.sleep(0,2)
    end
    for i = 0, 13 do
        turtle.back()
    end
end

Ругается на .list() в 7 строке и не едет