Stuck with guiSetText

[callum123]

    local char = (getPlayerName(localPlayer)):gsub( "_", " " ) 
    local health = (getElementHealth(localPlayer)) 
    local armor = (getPedArmor(localPlayer)) 
    local money = (getPlayerMoney(localPlayer)) 
    local hour, minute = getTime() 
     
function togHud() 
    mainWindow = guiCreateWindow(484,318,308,166,"Multi Theft Auto Roleplay",false) 
    btnClose = guiCreateButton(200,127,100,30,"Close",false,mainWindow) 
    btnNameLabel = guiCreateLabel(15,28,94,16,"Character Name: ",false,mainWindow) 
    btnTimeLabel = guiCreateLabel(14,53,32,16,"Time: ",false,mainWindow) 
    btnHealthLabel = guiCreateLabel(14,77,38,16,"Health: ",false,mainWindow) 
    btnArmorLabel = guiCreateLabel(13,101,38,18,"Armor: ",false,mainWindow) 
    btnMoneyLabel = guiCreateLabel(14,127,42,15,"Money: ",false,mainWindow) 
    btnChar = guiCreateLabel(105,28,169,17," "..char.."",false,mainWindow) 
    btnTime = guiCreateLabel(44,53,70,15," "..hour..":"..minute.."",false,mainWindow) 
    btnHealth = guiCreateLabel(53,78,169,16,"lol",false,mainWindow) 
    btnArmor = guiCreateLabel(49,101,70,19,"lol",false,mainWindow) 
    btnMoney = guiCreateLabel(53,128,112,17,"lol",false,mainWindow) 
    addEventHandler( "onClientGUIClick", btnClose, DestroyGUI, false) 
end 
addCommandHandler("hud", togHud) 
  
addEventHandler( "onClientRender", getRootElement(), 
    function() 
        if isElement( localPlayer ) then 
            guiSetText ( btnHealth, "" .. math.floor( getElementHealth(localPlayer ) ) ) 
            guiSetText ( btnArmor, "" .. math.floor( getPedArmor( localPlayer ) ) ) 
            guiSetText ( btnMoney, "" .. math.floor( getPlayerMoney( localPlayer ) ) ) 
             
        end 
    end 
) 
  
  
function DestroyGUI() 
    guiSetVisible(mainWindow, false) 
end 

Errors on line 27, 28, 29:

Bad argument @ 'guiSetText' [Expected gui-element at argument 1, got nil

Been having a look around and still cannot see what I am doing particularly wrong, I check the MTA for this, and the example was not the greatest.

[Castillo]

That's because is trying to set the text of a non existing element, as the GUI is not created at the start, you should add the event handler to render it inside "togHud" function, and remove it on "DestroyGUI" function.

local char = (getPlayerName(localPlayer)):gsub( "_", " " ) 
local health = getElementHealth ( localPlayer ) 
local armor = getPedArmor ( localPlayer ) 
local money = getPlayerMoney ( ) 
local hour, minute = getTime ( ) 
    
function togHud ( ) 
    mainWindow = guiCreateWindow(484,318,308,166,"Multi Theft Auto Roleplay",false) 
    btnClose = guiCreateButton(200,127,100,30,"Close",false,mainWindow) 
    btnNameLabel = guiCreateLabel(15,28,94,16,"Character Name: ",false,mainWindow) 
    btnTimeLabel = guiCreateLabel(14,53,32,16,"Time: ",false,mainWindow) 
    btnHealthLabel = guiCreateLabel(14,77,38,16,"Health: ",false,mainWindow) 
    btnArmorLabel = guiCreateLabel(13,101,38,18,"Armor: ",false,mainWindow) 
    btnMoneyLabel = guiCreateLabel(14,127,42,15,"Money: ",false,mainWindow) 
    btnChar = guiCreateLabel(105,28,169,17," "..char.."",false,mainWindow) 
    btnTime = guiCreateLabel(44,53,70,15," "..hour..":"..minute.."",false,mainWindow) 
    btnHealth = guiCreateLabel(53,78,169,16,"lol",false,mainWindow) 
    btnArmor = guiCreateLabel(49,101,70,19,"lol",false,mainWindow) 
    btnMoney = guiCreateLabel(53,128,112,17,"lol",false,mainWindow) 
    addEventHandler ( "onClientGUIClick", btnClose, DestroyGUI, false ) 
    addEventHandler ( "onClientRender", getRootElement(), renderData ) 
end 
addCommandHandler("hud", togHud) 
  
function renderData ( ) 
    guiSetText ( btnHealth, "" .. math.floor ( getElementHealth(localPlayer ) ) ) 
    guiSetText ( btnArmor, "" .. math.floor ( getPedArmor( localPlayer ) ) ) 
    guiSetText ( btnMoney, "" .. math.floor ( getPlayerMoney( ) ) ) 
end 
  
  
function DestroyGUI ( ) 
    guiSetVisible ( mainWindow, false ) 
    removeEventHandler ( "onClientRender", getRootElement(), renderData ) 
end