[LUA scripting]

anyone know how to correct this script?

i keep getting error on choice number 2...

the function is to search a number when press Search, then refine search and freeze the first 4 address to 10. after done unfreeze and clear the list.

function doAction()
    local menu = gg.choice({'Search','Change','Clear','exit'})
    if menu==1 then 
        gg.clearResults()
        gg.searchNumber('1.23',gg.TYPE_FLOAT,false,gg.SIGN_EQUAL,0,-1) end
    if menu==2 then
        gg.refineNumber('4.56',gg.TYPE_FLOAT,false,gg.SIGN_EQUAL,0,-1)
        local t = gg.getResults(4)
        t[1].value = '10'
        t[1].freeze = true
        t[1].freezeType = FREEZE_NORMAL
        t[2].value = '10'
        t[2].freeze = true
        t[2].freezeType = FREEZE_NORMAL
        t[3].value = '10'
        t[3].freeze = true
        t[3].freezeType = FREEZE_NORMAL
        t[4].value = '10'
        t[4].freeze = true
        t[4].freezeType = FREEZE_NORMAL
        gg.addListItems(t) end
    if menu==3 then
        local r = gg.getListItems()
        r[1].freeze = false
        r[2].freeze = false
        r[3].freeze = false
        r[4].freeze = false
        gg.clearList()
        end
    if menu==4 then os.exit() end
end
gg.setVisible(false)
while true do
    if gg.isVisible() then
        gg.setVisible(false)
        doAction()
    end
    gg.sleep(100)
end