Error: attempt to index nil with 'FindFirstChild' How to fix this?

Asked by
4 years ago
Edited 4 years ago
I have a game similar to ToH. The tower changing script sometimes does not work. The script works fine with no problems for some time, then randomly it stops working. I get an error message on line 146 saying: attempt to index nil with 'FindFirstChild' This is my script:
001-- Services Variables
002local ReplicatedStorage = game:GetService("ReplicatedStorage")
003local ServerStorage = game:GetService("ServerStorage")
004local Players = game:GetService("Players")
005 
006-- ServerStorage Variables
007local StagesFolder = ServerStorage:WaitForChild("Stages")
008local Stages = StagesFolder:GetChildren()
009 
010-- Workspace Variables
011local Tower = game.Workspace:WaitForChild("Tower")
012local Storage = game.Workspace:WaitForChild("Storage")
013local Lobby = Storage:WaitForChild("Lobby")
014local End = Storage:WaitForChild("End")
015local SpawnsModel = Lobby:WaitForChild("Spawns")
016local Spawns = SpawnsModel:GetChildren()
017local Songs = game.Workspace:WaitForChild("Songs")
018local WinTp = workspace.WinTp
019local RandomSong
020local RandomSpawn
021 
022-- ReplicatedStorage Variables
023local TimerSpeed = ReplicatedStorage:WaitForChild("TimerSpeed")
024local Minutes = ReplicatedStorage:WaitForChild("Minutes")
025local Seconds = ReplicatedStorage:WaitForChild("Seconds")
026local TimerTag = ReplicatedStorage:WaitForChild("TimerTag")
027local MultiplierVisible = ReplicatedStorage:WaitForChild("MultiplierVisible")
028local Multiplies = ReplicatedStorage:WaitForChild("Multiplies")
029local TowerHeight = ReplicatedStorage:WaitForChild("TowerHeight")
030local MutatorsFolder = ReplicatedStorage:WaitForChild("Mutators")
031 
032local Floor1
033local Floor2
034local Floor3
035local Floor4
036local Floor5
037 
038debounce = false
039 
040function NewTower()
041    debounce = true
042    Floor1 = Stages[math.random(1, #Stages)]:Clone()
043    Floor1.Parent = Tower
044    Floor1.PrimaryPart = Floor1:FindFirstChild("Center")
045    Floor1:SetPrimaryPartCFrame(Floor1.Center.CFrame)
046    local Floor1Height = Floor1.Height.Value
047    wait()
048    Floor2 = Stages[math.random(1, #Stages)]:Clone()
049    Floor2.Parent = Tower
050    Floor2.PrimaryPart = Floor2:FindFirstChild("Center")
051    Floor2:SetPrimaryPartCFrame(Floor1.Center.CFrame + Vector3.new(0, Floor1Height, 0))
052    Floor2:SetPrimaryPartCFrame(Floor2.Center.CFrame * CFrame.Angles(0, math.rad(180), 0))
053    local Floor2Height = Floor2.Height.Value
054    wait()
055    Floor3 = Stages[math.random(1, #Stages)]:Clone()
056    Floor3.Parent = Tower
057    Floor3.PrimaryPart = Floor3:FindFirstChild("Center")
058    Floor3:SetPrimaryPartCFrame(Floor2.Center.CFrame + Vector3.new(0, Floor2Height, 0))
059    Floor3:SetPrimaryPartCFrame(Floor3.Center.CFrame * CFrame.Angles(0, math.rad(180), 0))
060    local Floor3Height = Floor3.Height.Value
061    wait()
062    Floor4 = Stages[math.random(1, #Stages)]:Clone()
063    Floor4.Parent = Tower
064    Floor4.PrimaryPart = Floor4:FindFirstChild("Center")
065    Floor4:SetPrimaryPartCFrame(Floor3.Center.CFrame + Vector3.new(0, Floor3Height, 0))
066    Floor4:SetPrimaryPartCFrame(Floor4.Center.CFrame * CFrame.Angles(0, math.rad(180), 0))
067    local Floor4Height = Floor4.Height.Value
068    wait()
069    Floor5 = Stages[math.random(1, #Stages)]:Clone()
070    Floor5.Parent = Tower
071    Floor5.PrimaryPart = Floor5:FindFirstChild("Center")
072    Floor5:SetPrimaryPartCFrame(Floor4.Center.CFrame + Vector3.new(0, Floor4Height, 0))
073    Floor5:SetPrimaryPartCFrame(Floor5.Center.CFrame * CFrame.Angles(0, math.rad(180), 0))
074    local Floor5Height = Floor5.Height.Value
075    wait()
076    End.PrimaryPart = End:WaitForChild("Center")
077    End:SetPrimaryPartCFrame(Floor5.Center.CFrame + Vector3.new(0, Floor5Height), 0)
078    End:SetPrimaryPartCFrame(End.Center.CFrame * CFrame.Angles(0, math.rad(180), 0))
079    debounce = false
080 
081    TowerHeight.Value = Floor1Height + Floor2Height + Floor3Height + Floor4Height + Floor5Height + 15 * 2
082    ReplicatedStorage.HeightEvent:FireAllClients(TowerHeight.Value)
083end
084 
085function NewRound()
086    RandomSong:Stop()
087    print("Stopped Song")
088    wait()
089    RandomSong = Songs:GetChildren()[math.random(1, #Songs:GetChildren())]
090    RandomSong:Play()
091    print("Played Song")
092    for i, v in pairs(Players:GetChildren()) do
093        v.Character.Head.CFrame = Spawns[math.random(1, #Spawns)].CFrame
094    end
095    print("Teleported Players To Lobby")
096    for i, v in pairs(MutatorsFolder:GetChildren()) do
097        v.Value = false
098        print("Cleared Mutators")
099    end
100    Minutes.Value = 8
101    print("Reset Minutes")
102    Seconds.Value = 0
103    print("Reset Seconds")
104    TimerSpeed.Value = 1
105    print("Reset Timer Speed")
106    MultiplierVisible.Value = false
107    print("Mutiplier Visible Set To False")
108    Multiplies.Value = 1
109    print("Multiplies Value Set To 1")
110    Tower:ClearAllChildren()
111    print("Cleared Tower")
112    NewTower()
113    print("New Tower")
114end
115 
116RandomSong = Songs:GetChildren()[math.random(1, #Songs:GetChildren())]
117RandomSong:Play()
118Minutes.Value = 8
119Seconds.Value = 0
120TimerSpeed.Value = 1
121MultiplierVisible.Value = false
122Multiplies.Value = 1
123debounce = true
124NewTower()
125 
126while true do
127    if Minutes and Seconds and TimerSpeed and Tower and Stages then
128        repeat
129            if Seconds.Value <= 9 then
130                TimerTag.Value = tostring(Minutes.Value)..":0"..tostring(Seconds.Value)
131            else
132                TimerTag.Value = tostring(Minutes.Value)..":"..tostring(Seconds.Value)
133            end
134            if Seconds.Value <= 0 then
135                Minutes.Value = Minutes.Value - 1
136                Seconds.Value = 59
137            else
138                Seconds.Value = Seconds.Value - 1
139            end
140            wait(TimerSpeed.Value)
141        until Minutes.Value <= 0 and Seconds.Value <= 0
142        if Minutes.Value <= 0 and Seconds.Value <= 1 then
143            TimerTag.Value = "0:00"
144            wait(0.1)
145            for i, v in pairs(Players:GetChildren()) do
146                if v.Character:FindFirstChild("Win") then
147                    v.Character.Win:Destroy()
148                end
149                if v:FindFirstChild("Backpack") then
150                    v.Backpack:ClearAllChildren()
151                end
152            end
153            RandomSong:Stop()
154            print("Stopped Song")
155            wait()
156            RandomSong = Songs:GetChildren()[math.random(1, #Songs:GetChildren())]
157            RandomSong:Play()
158            print("Played Song")
159            for i, v in pairs(Players:GetChildren()) do
160                v.Character.Head.CFrame = Spawns[math.random(1, #Spawns)].CFrame
161            end
162            print("Teleported Players To Lobby")
163            for i, v in pairs(MutatorsFolder:GetChildren()) do
164                v.Value = false
165                print("Cleared Mutators")
166            end
167            Minutes.Value = 8
168            print("Reset Minutes")
169            Seconds.Value = 0
170            print("Reset Seconds")
171            TimerSpeed.Value = 1
172            print("Reset Timer Speed")
173            MultiplierVisible.Value = false
174            print("Mutiplier Visible Set To False")
175            Multiplies.Value = 1
176            print("Multiplies Value Set To 1")
177            Tower:ClearAllChildren()
178            print("Cleared Tower")
179            NewTower()
180            print("New Tower")
181        end
182    end
183end
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Error: attempt to index nil with 'FindFirstChild' How to fix this?

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