What is wrong with this script? [Unanswered]

So here is the problem, you have the an axe tool, and what it is sapose to do is when you click it and it hits a Tree in this case "Medium Tree" it will go into the log and then go to the value named Resistance and decrease the value by a random amount. But that does not work,

2 ERRORS IN THE OUTPUT ---)Players.Player.Backpack.WoodenAxe.SwordScript:31: attempt to index local 'humanoid' (a nil value)

---)10:49:52.860 - parent is not a valid member of Script

Axe Script

r = game:service("RunService") 
ching = false 
sword = script.Parent.Handle 
Tool = script.Parent
lowdamage = Tool.WeaponSettings.MinDamage.Value
maxdamage = Tool.WeaponSettings.MaxDamage.Value
reload = Tool.WeaponSettings.ReloadTime.Value

local SlashSound = Instance.new("Sound")
SlashSound.SoundId = "rbxasset://sounds\\swordslash.wav"
SlashSound.Parent = sword
SlashSound.Volume = .7

local LungeSound = Instance.new("Sound")
LungeSound.SoundId = "rbxasset://sounds\\swordlunge.wav"
LungeSound.Parent = sword
LungeSound.Volume = .6

local UnsheathSound = Instance.new("Sound")
UnsheathSound.SoundId = "rbxasset://sounds\\unsheath.wav"
UnsheathSound.Parent = sword
UnsheathSound.Volume = 1


function blow(hit)
    if ching == true then return end
    local humanoid = hit.Parent.Log:findFirstChild("Resistance")
    local vCharacter = Tool.Parent
    local vPlayer = game.Players:playerFromCharacter(vCharacter)
    local hum = vCharacter:findFirstChild("Humanoid")
    if humanoid.Value <= 1 then
        print("AXE HIT")-- I do not see things printed in the output

        local damage = math.random(lowdamage,maxdamage)

        humanoid.Value = humanoid.Value - damage
        print("Took"..damage"Damage!!")-- I do not see things printed in the output

    end
end

function tagHumanoid(humanoid, player)
    local creator_tag = Instance.new("ObjectValue")
    creator_tag.Value = player
    creator_tag.Name = "creator"
    creator_tag.Parent = humanoid
end

function untagHumanoid(humanoid)
    if humanoid ~= nil then
        local tag = humanoid:findFirstChild("creator")
        if tag ~= nil then
            tag.Parent = nil
        end
    end
end


function attack()
    damage = slash_damage
    SlashSound:play()
    local anim = Instance.new("StringValue")
    anim.Name = "toolanim"
    anim.Value = "Slash"
    anim.Parent = Tool
end



function swordUp()
    Tool.GripForward = Vector3.new(-1,0,0)
    Tool.GripRight = Vector3.new(0,1,0)
    Tool.GripUp = Vector3.new(0,0,1)
end

function swordOut()
    Tool.GripForward = Vector3.new(0,0,1)
    Tool.GripRight = Vector3.new(0,-1,0)
    Tool.GripUp = Vector3.new(-1,0,0)
end




Tool.Enabled = true
local last_attack = 0
function onActivated()

    if not Tool.Enabled then
        return
    end

    Tool.Enabled = false

    local character = Tool.Parent;
    local humanoid = character.Humanoid
    if humanoid == nil then
        print("Humanoid not found")
        return 
    end

    t = r.Stepped:wait()

    if (t - last_attack < .2) then

    else
        attack()
    end

    last_attack = t

    wait(reload)

    Tool.Enabled = true
end


function onEquipped()
    UnsheathSound:play()
end


script.Parent.Activated:connect(onActivated)
script.Parent.Equipped:connect(onEquipped)


connection = sword.Touched:connect(blow)

There is a script in the value that makes it drop whatever i want it to drop in front of it after resistance <1 here it is

function Drop() 
local drops = {"MediumLog", "SmallLog", "MediumLog"}
local G = math.random(1, 5)
local Obj = game.Lighting:findFirstChild(drops[G]):Clone() 
Obj.Parent = game.Workspace
Obj.Handle.CFrame = script.Parent.Head.CFrame + Vector3.new(5,2,0)
script:remove()
end 

while true do 
    wait(.1) 
    if (script.Parent.Value <1) then
        Drop() 
        wait(.1)
        script.Parent.Parent.Parent:Destroy()
    end 
end

while true do
    wait(.1)
    if (script.Parent.Value <45) then
        print("TREE TOOK DAMAGE")-- I do not see things printed in the output

    elseif (script.Parent.Value <40) then


        print("TREE TOOK MORE DAMAGE")-- I do not see things printed in the output
    end





end

while true do
    wait(1)
    print(script.Parent.Value) -- I do not see things printed in the output
end

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All Usefull Help Appreciated ^.^