[wolftech]

I am working on some unit frames and I have run into an error on Beta I can not seem to nail down. When I target some NPCs and Mobs (but not players), I get a Division by Zero error in what is line 37 in this snippet. It works fine on Live, but I can't find what changed in Beta.

Can you help a n00b out?

local firstload = true
function TUF:TargetUpdate()
    if firstload and not TextUnitFramesLiteDB.general.combat then
        firstload = false
        target:SetPoint(TextUnitFramesLiteDB.target.loc.p, UIParent, TextUnitFramesLiteDB.target.loc.rP, TextUnitFramesLiteDB.target.loc.x, TextUnitFramesLiteDB.target.loc.y)
    end
    if UnitExists("target") then
        TUF:LockTargetFrame()
        local fg, fn = UnitFactionGroup("target")
        if fg ~= nil then target.faction:SetTexture("Interface\\GROUPFRAME\\UI-Group-PVP-"..fg) else target.faction:SetTexture("Interface\\PVPFrame\\PVP-ArenaPoints-Icon") end
        target.faction:Show()
        target.level:SetPoint("TOPLEFT", target, "TOPLEFT", 5, -5)
        target.name:SetPoint("LEFT", target.level, "RIGHT", 5, 0)
        if TextUnitFramesLiteDB.target.orientation then
            target.health:ClearAllPoints()
            target.mana:ClearAllPoints()
            target.health:SetPoint("TOPLEFT", target.level, "BOTTOMLEFT", 0, 0)
            target.mana:SetPoint("TOPLEFT", target.health, "BOTTOMLEFT", 0, 0)
        else
            target.health:ClearAllPoints()
            target.mana:ClearAllPoints()
            target.health:SetPoint("LEFT", target.name, "RIGHT", 5, 0)
            target.mana:SetPoint("LEFT", target.health, "RIGHT", 0, 0)
        end
        
        target.level:SetFontObject(GameFontNormalLarge)
        target.name:SetFontObject(GameFontNormalHuge)
        target.health:SetFontObject(NumberFontNormalLarge)
        target.mana:SetFontObject(NumberFontNormalLarge)
        
        target.level:SetText(UnitLevel("target"))
        target.name:SetText(UnitName("target"))
        local _, cls = UnitClass("target")
        if cls ~= nil then target.name:SetTextColor(RAID_CLASS_COLORS[cls].r, RAID_CLASS_COLORS[cls].g, RAID_CLASS_COLORS[cls].b) end
        local htxtclr = TUF:SetTextColor(UnitHealth("target")/UnitHealthMax("target")*100)
        target.health:SetTextColor(htxtclr.r, htxtclr.g, htxtclr.b, 1)
        local mtxtclr = TUF:SetTextColor(UnitPower("target")/UnitPowerMax("target")*100)
        target.mana:SetTextColor(mtxtclr.r, mtxtclr.g, mtxtclr.b, 1)
        if TextUnitFramesLiteDB.target.percent then
            target.health:SetText("|Cff00ff00H|r-"..string.format("%4.0f", UnitHealth("target")/UnitHealthMax("target")*100).."%")  
            if UnitPowerType("target") == 0 then -- mana
                target.mana:SetText("|cff3300cc M|r-"..string.format("%4.0f", UnitPower("target")/UnitPowerMax("target")*100).."%")     
            elseif UnitPowerType("target") == 3 then -- energy
                target.mana:SetText("|cffffff00E |r-"..UnitPower("target").." |cff990099 Combo|r: "..GetComboPoints("target"))
            elseif UnitPowerType("target") == 1 then -- rage
                target.mana:SetText("|cffff3333Rage|r- "..UnitPower("target").."|cff666666 /|r"..UnitPowerMax("target"))
            elseif UnitPowerType("target") == 5 then
                target.mana:SetText("|cff99ccffRP|r- "..UnitPower("target").."|cff666666 /|r"..UnitPowerMax("target"))
            elseif UnitPowerType("target") == 6 then-- Runic
                target.mana:SetText("|cff99ccffRP|r- "..UnitPower("target").."|cff666666 /|r"..UnitPowerMax("target"))
            else -- focus, happieness
                target.mana:SetText("|cffffcc00F|r- "..UnitPower("target").."|cff666666 /|r"..UnitPowerMax("target"))
            end
        else
            target.health:SetText("|Cff00ff00H|r- "..UnitHealth("target").."|Cff666666 /|r"..UnitHealthMax("target"))
            if UnitPowerType("target") == 0 then -- mana
                target.mana:SetText("|cff3300cc M|r-"..UnitPower("target").."|Cff666666 /|r"..UnitPowerMax("target"))       
            elseif UnitPowerType("target") == 3 then -- energy
                target.mana:SetText("|cffffff00E |r-"..UnitPower("target").." |Cff990099 Combo|r: "..GetComboPoints("target"))
            elseif UnitPowerType("target") == 1 then -- rage
                target.mana:SetText("|cffff3333Rage|r- "..UnitPower("target").."|Cff666666 /|r"..UnitPowerMax("target"))
            elseif UnitPowerType("target") == 5 then
                target.mana:SetText("|cff99ccffRP|r- "..UnitPower("target").."|Cff666666 /|r"..UnitPowerMax("target"))
            elseif UnitPowerType("target") == 6 then-- Runic
                target.mana:SetText("|cff99ccffRP|r- "..UnitPower("target").."|Cff666666 /|r"..UnitPowerMax("target"))
            else -- focus, happieness
                target.mana:SetText("|cffffcc00F|r- "..UnitPower("target").."|Cff666666 /|r"..UnitPowerMax("target"))
            end
        end
        
        local ll = target.level:GetStringWidth()
        local nl = target.name:GetStringWidth()
        local hl = target.health:GetStringWidth()
        local ml = target.mana:GetStringWidth()
        if not TextUnitFramesLiteDB.target.orientation and not TextUnitFramesLiteDB.general.combat then
            local len = ll + nl + hl + ml + 20
            target:SetWidth(len)
            target:SetHeight(target.level:GetHeight() + 20)
        elseif TextUnitFramesLiteDB.target.orientation and not TextUnitFramesLiteDB.general.combat then
            local len = math.max(ll + nl, ml, hl)
            target:SetWidth(len + 20 )
            local lh = target.level:GetHeight()
            local hh = target.health:GetHeight()
            local mh = target.mana:GetHeight()
            target:SetHeight(lh + hh + mh + 20)
        end
        
        if UnitExists("playertargettarget") then
            if TextUnitFramesLiteDB.target.targettop then
                target.target:ClearAllPoints()
                target.target:SetPoint("TOPLEFT", target, "BOTTOMLEFT", 10, 10)
            else
                target.target:ClearAllPoints()
                target.target:SetPoint("LEFT", target, "RIGHT", -10, 0)
            end
            target.target.level:SetFontObject(GameFontNormal)
            target.target.name:SetFontObject(GameFontNormal)
            target.target.level:SetText(UnitLevel("playertargettarget"))
            target.target.name:SetText(UnitName("playertargettarget"))
            target.target.level:SetPoint("TOPLEFT", target.target, "TOPLEFT", 5, -5)
            target.target.name:SetPoint("LEFT", target.target.level, "RIGHT", 5, 0)
            
            local ttlw = target.target.level:GetStringWidth()
            local ttnw = target.target.name:GetStringWidth()
            target.target:SetHeight(target.target.name:GetHeight()+12)
            target.target:SetWidth(ttlw + ttnw + 10)
        end
        
        if not TextUnitFramesLiteDB.general.combat then 
            if TextUnitFramesLiteDB.target.enabled then target:Show() else target:Hide() end
            if UnitExists("target") then target:Show() else target:Hide() end
            if TextUnitFramesLiteDB.target.target and UnitExists("playertargettarget") then target.target:Show() else target.target:Hide() end
        end
    else 
        target:Hide()
    end
end

This is the error I get:

339x TextUnitFramesLite-5.0\target-Target.lua:131: Division by zero
TextUnitFramesLite-5.0\target-Target.lua:131: in function "TargetUpdate"
TextUnitFramesLite-5.0\main.lua:126: in function <TextUnitFramesLite\main.lua:119>

Locals:
self = TUF {
 0 = <userdata>
 lockPetF = <func> @TextUnitFramesLite\options.lua:404
 enablePetTF = <func> @TextUnitFramesLite\options.lua:430
 lockfocusF = <func> @TextUnitFramesLite\options.lua:452
 orientPetF = <func> @TextUnitFramesLite\options.lua:396
 HideBlizzFocus = <func> @TextUnitFramesLite\focus.lua:201
 ShowBlizzFocus = <func> @TextUnitFramesLite\focus.lua:205
 hideBlizzfocusF = <func> @TextUnitFramesLite\options.lua:439
 target = TUF_Target {}
 OnUpdate = <func> @TextUnitFramesLite\main.lua:119
 pet = TUF_Pet {}
 enablePF = <func> @TextUnitFramesLite\options.lua:353
 player = TUF_Player {}
 HideBlizzPlayer = <func> @TextUnitFramesLite\player.lua:172
 percfocusF = <func> @TextUnitFramesLite\options.lua:448
 generalO_Load = <func> @TextUnitFramesLite\options.lua:315
 enablePetF = <func> @TextUnitFramesLite\options.lua:425
 focus = TUF_Focus {}
 SetTextColor = <func> @TextUnitFramesLite\util.lua:8
 orientfocusTF = <func> @TextUnitFramesLite\options.lua:483
 percPF = <func> @TextUnitFramesLite\options.lua:381
 LockTargetFrame = <func> @TextUnitFramesLite\options.lua:487
 FocusUpdate = <func> @TextUnitFramesLite\focus.lua:67
 orientfocusF = <func> @TextUnitFramesLite\options.lua:444
 enablefocusTF = <func> @TextUnitFramesLite\options.lua:479
 enablefocusF = <func> @TextUnitFramesLite\options.lua:474
 PlayerUpdate = <func> @TextUnitFramesLite\player.lua:82
 ShowBlizzPlayer = <func> @TextUnitFramesLite\player.lua:176
 hideBlizzPF = <func> @TextUnitFramesLite\options.lua:391
 OnEvent = <func> @TextUnitFramesLite\main.lua:84
 percPetF = <func> @TextUnitFramesLite\options.lua:400
 playerO_Load = <func> @TextUnitFramesLite\options.lua:321
 orientPetTF = <func> @TextUnitFramesLite\options.lua:434
 orientPF = <func> @TextUnitFramesLite\options.lua:386
 PetUpdate = <func> @TextUnitFramesLite\pet.lua:68
 TargetUpdate = <func> @TextUnitFramesLite\target.lua:96
 targetO_Load = <func> @TextUnitFramesLite\options.lua:342
 lockPF = <func> @TextUnitFramesLite\options.lua:359
}
elapsed = 0.019000001251698

And here is the section in main.lua (beginning with 119)

function TUF:OnUpdate(elapsed)
    if not TextUnitFramesLiteDB.general then TextUnitFramesLiteDB.general = {} end
    if not TextUnitFramesLiteDB.general.elapsed then TextUnitFramesLiteDB.general.elapsed = 0 end
    if not TextUnitFramesLiteDB.general.updaterate then TextUnitFramesLiteDB.general.updaterate = 0.066 end
    TextUnitFramesLiteDB.general.elapsed = TextUnitFramesLiteDB.general.elapsed + elapsed
    if TextUnitFramesLiteDB.general.elapsed > TextUnitFramesLiteDB.general.updaterate then
        if UnitExists("target") then if TextUnitFramesLiteDB.target.enabled then TUF.target:Show() end if TextUnitFramesLiteDB.target.hideblizztargetframe then TargetFrame:Hide() end end
        TUF:TargetUpdate()
        TUF:PlayerUpdate()
        TUF:PetUpdate()
        TUF:FocusUpdate()
        if TextUnitFramesLiteDB.general.combat then TUF.player.combat:Show() else TUF.player.combat:Hide() end
        if UnitIsPVP("player") then TUF.player.pvp:Show() else TUF.player.pvp:Hide() end
        if UnitIsPVP("target") then TUF.target.pvp:Show() else TUF.target.pvp:Hide() end
        local lootmethod, mlpID, mlRID = GetLootMethod()
        if lootmethod == "master" then
            if mlpID == nil then 
                TUF.player.masterloot:Hide()
            elseif mlpID == 0 then
                TUF.player.masterloot:Show()
            end
        end
        if IsResting() then TUF.player.rest:Show() else TUF.player.rest:Hide() end
        TextUnitFramesLiteDB.general.elapsed = 0
    end