DarkRP - Can't Arrest

[Snowpaw]

So, lately you can't arrest people in-game with arrest sticks so I tried doing it in console and I got this error.

[ERROR] gamemodes/darkrp/entities/entities/ent_unarrestbox/shared.lua:62: attempt to index global 'Lockpick' (a nil value)
1. fn - gamemodes/darkrp/entities/entities/ent_unarrestbox/shared.lua:62
2. Call - addons/ulib/lua/ulib/shared/hook.lua:183
3. arrest - gamemodes/darkrp/gamemode/modules/police/sv_init.lua:83
4. unknown - gamemodes/darkrp/gamemode/modules/police/sv_init.lua:237
5. unknown - lua/includes/modules/concommand.lua:69

Here are the scripts:

gamemodes/darkrp/entities/entities/ent_unarrestbox/shared.lua

AddCSLuaFile()
ENT.Type = "anim"  
ENT.Base = "base_gmodentity"     
ENT.PrintName		= "Unarrest Box" 
ENT.Author			= "shadowndacorner"
ENT.Contact			= ""  
ENT.Purpose			= ""  
ENT.Instructions	= "Unarrest people."

ENT.Spawnable			= false
ENT.AdminSpawnable		= true

function ENT:Initialize()     
	self:SetModel( "models/items/ammocrate_smg1.mdl" )  
	self:PhysicsInit( SOLID_VPHYSICS )
	self:SetSolid( SOLID_VPHYSICS )
	if SERVER then
		self:SetUseType(SIMPLE_USE)
	end
	local phys = self.Entity:GetPhysicsObject()  
	phys:Wake()  
	self:SetMoveType( MOVETYPE_NONE )
	phys:SetMass( 200 )
	if !DarkRP then self:Remove() end
end

function ENT:Unarrest(ply)
	local ang=ply:EyeAngles()
	local pos=ply:GetPos()
	local mdl=ply:GetModel()
	local paw=ply.PreArrestWeapons
	local paa=ply.PreArrestAmmo
	ply:unArrest()
	ply:wanted(NULL, "Escaping from jail!")
	timer.Simple(0.1+FrameTime(), function()
		ply:SetPos(pos)
		ply:SetEyeAngles(ang)
		ply:SetModel(mdl)
		ply:StripWeapons()
		for f, v in pairs(paw) do
			ply:Give(v)
		end
		for f, v in pairs(paa) do
			ply:SetAmmo(v, f)
		end
		ply.oWalkSpeed = ply.PreArrestWS
		ply.oRunSpeed = ply.PrearrestRS
		timer.Simple(0.5, function()
			ply:SetWalkSpeed(ply.PreArrestWS)
			ply:SetRunSpeed(ply.PreArrestRS or ply:GetWalkSpeed()*2)
			ply:SprintEnable(true)
			ply:SetLockpickCount(ply.PreArrestLockpicks + ply:GetLockpickCount())
			
			ply.PreArrestWS=nil
			ply.PreArrestRS=nil
			ply.PreArrestLockpicks=nil
		end)
	end)
end

hook.Add('playerArrested', 'GetAllWeapons', function(ply, time, enf)
	if Lockpick.Config.EnableBreakout then
		ply.PreArrestWS=ply:GetWalkSpeed()
		ply.PreArrestRS=ply:GetRunSpeed()
		ply.PreArrestWeapons={}
		ply.PreArrestAmmo={}
		local picksToKeep = math.min(ply:GetLockpickCount(), Lockpick.Config.JailPicks)
		ply.PreArrestLockpicks = ply:GetLockpickCount() - picksToKeep
		ply:SetLockpickCount(picksToKeep)
		for f, v in pairs(ply:GetWeapons()) do
			ply.PreArrestWeapons[f]=v:GetClass()
			ply.PreArrestAmmo[v:GetPrimaryAmmoType()]=ply:GetAmmoCount(v:GetPrimaryAmmoType())
			ply.PreArrestAmmo[v:GetSecondaryAmmoType()]=ply:GetAmmoCount(v:GetPrimaryAmmoType())
		end
	end
end)

hook.Add('playerUnArrested', 'DeleteWeapons', function(ply, time, enf)
	ply.PreArrestWeapons=nil
	ply.PreArrestAmmo=nil
end)

function ENT:Use(ply)
end

function ENT:UpdateTransmitState()
	return TRANSMIT_PVS
end

function ENT:Draw()
	self.Entity:DrawModel()
	cam.Start3D2D(self:GetPos()+self:GetAngles():Up()*self:OBBMaxs().z/2-self:GetAngles():Forward()*16-self:GetAngles():Right()*12, self:GetAngles()+Angle(180, 90, -90), 0.12)
		surface.SetDrawColor(80, 80, 80, 200)
		surface.DrawRect(11, 0, (23/0.12), 10/0.12)
		
		surface.SetTextColor(255, 255, 255, 255)
		surface.SetFont('Lockpick')
		local txt="Evidence"
		if LocalPlayer():isArrested() then
			txt=txt.." (Lockpick to Unarrest)"
		end
		local x, y=surface.GetTextSize(txt)
		surface.SetTextPos((25/0.12/2)-x/2, 12.5-y/2)
		surface.DrawText(txt)
	cam.End3D2D()
end 

if Lockpick and Lockpick.Config then
	function Lockpick:CreateUnarrestBox()
		if SERVER and !self.Config.DisableJailPicks and self.Config.EnableBreakout and Lockpick.Config.UnarrestBoxPositions[game.GetMap()] then
			local ent=ents.Create('ent_unarrestbox')
			local pt=Lockpick.Config.UnarrestBoxPositions[game.GetMap()]
			//ent:SetPos(pt.CratePos)
			//ent:SetAngles(pt.CrateAng)
			ent:Spawn()
			ent:Activate()
			
			ent:SetPos(pt.CratePos)
			ent:SetAngles(pt.CrateAng)
		end
	end
	
	game.lpoCleanUpMap=game.lpoCleanUpMap or game.CleanUpMap
	function game.CleanUpMap(...)
		game.lpoCleanUpMap(...)
		timer.Simple(0, function()
			Lockpick:CreateUnarrestBox()
		end)
	end
	
	hook.Add('InitPostEntity', 'CreateUnarrestBox', function()
		Lockpick:CreateUnarrestBox()
	end)
end

addons/ulib/lua/ulib/shared/hook.lua

--[[
	Title: Hook

	This overrides garry's default hook system. We need this better hook system for any serious development.
	We're implementing hook priorities. hook.Add() now takes an additional parameter of type number between -20 and 20.
	0 is default (so we remain backwards compatible). -20 and 20 are read only (ignores returned values).
	Hooks are called in order from -20 on up.
]]

-- This file is coded a little awkwardly because we're trying to implement a new behavior while remaining as true to the old behavior as possible.

-- Globals that we are going to use
local gmod          = gmod
local pairs         = pairs
local isfunction    = isfunction
local isstring      = isstring
local IsValid       = IsValid

-- Needed due to our modifications
local table         = table
local ipairs        = ipairs
local tostring      = tostring

--[[ Needed for tests, below
local CLIENT = CLIENT
local print = print
local assert = assert
local error = error --]]

-- Grab all previous hooks from the pre-existing hook module.
local OldHooks = hook.GetTable()

-----------------------------------------------------------
--   Name: hook
--   Desc: For scripts to hook onto Gamemode events
-----------------------------------------------------------
module( "hook" )


-- Local variables
local Hooks = {}
local BackwardsHooks = {} -- A table fully to garry's spec for aVoN

local function sortHooks( event_name )
	for i=#Hooks[ event_name ], 1, -1 do
		local name = Hooks[ event_name ][ i ].name
		if not isstring( name ) and not IsValid( name ) then
			Remove( event_name, name )
		end
	end
	
	table.sort( Hooks[ event_name ], function( a, b ) -- Sort by priority, then name
		if a == nil then return false -- Move nil to end
		elseif b == nil then return true -- Keep nil at end
		elseif a.priority < b.priority then return true
		elseif a.priority == b.priority and tostring(a.name) < tostring(b.name) then return true
		else return false end
	end )
end


-- Exposed Functions

--[[
	Function: hook.GetTable

	Returns:

		The table filled with all the hooks in a format that is backwards compatible with garry's.
]]
function GetTable()
	return BackwardsHooks
end

--[[
	Function: hook.Add

	Our new and improved hook.Add function.
	Read the file description for more information on how the hook priorities work.

	Parameters:

		event_name - The name of the event (IE "PlayerInitialSpawn").
		name - The unique name of your hook.
			This is only so that if the file is reloaded, it can be unhooked (or you can unhook it yourself).
		func - The function callback to call
		priority - *(Optional, defaults to 0)* Priority from -20 to 20. Remember that -20 and 20 are read-only.
]]
function Add( event_name, name, func, priority )
	if not isfunction( func ) then return end
	if not isstring( event_name ) then return end
	
	if not Hooks[ event_name ] then
		BackwardsHooks[ event_name ] = {}
		Hooks[ event_name ] = {}
	end

	priority = priority or 0

	-- Make sure the name is unique
	Remove( event_name, name )

	table.insert( Hooks[ event_name ], { name=name, fn=func, priority=priority } )
	BackwardsHooks[ event_name ][ name ] = func -- Keep the classic style too so we won't break anything
	sortHooks( event_name )
end

--[[
	Function: hook.Remove

	Parameters:

		event_name - The name of the event (IE "PlayerInitialSpawn").
		name - The unique name of your hook. Use the same name you used in hook.Add()
]]
function Remove( eve

[DevulTj]

Can i ask, why are you using core DarkRP files & not using the DarkRPmodification addon?

[Snowpaw]

I'm not, I always use DarkRPmodification.

[Dynn]

[QUOTE=Snowpaw;45846508]I'm not, I always use DarkRPmodification.[/QUOTE]
So why is this file in the darkrp gamemode folder?
gamemodes/darkrp/entities/entities/ent_unarrestbox/shared.lua