Why won't my path finding NPC walk to me?

local mode = "move"
local dist = 50
local hrp = workspace:WaitForChild("humanoid"):WaitForChild("UpperTorso")
while wait() do
	for i ,v  in pairs(workspace:GetChildren{}) do
		local Target = nil
		local humanoid = v:FindFirstChild("Humanoid")
			if humanoid and v.Parent ~= "humanoid" and v.Name ~= "humanoid" then
				print(v.Name)
				if (workspace.humanoid.UpperTorso.Position - v:WaitForChild("UpperTorso").Position).magnitude < 500 then
					Target = v.UpperTorso.Position
					path = game:GetService("PathfindingService"):ComputeRawPathAsync(v.UpperTorso.Position, Target, 600)
					points = path:GetPointCoordinates()
					game.Workspace.Points:ClearAllChildren()
					if mode == "move" then
						print(#points)
						for Num = 1, #points do
							local hum = workspace.humanoid
							hum.Humanoid:MoveTo(points[Num])
							repeat
							distance =(points[Num] - hum.LowerTorso.Position).magnitude
							wait()
							until distance < 3
						end
					end
				end
			end
		end
	end

'print(#points)' prints 0 when it should be > 0 but i don't know what's wrong with it.

you can do this and put a value called Target

debugMode = false
targetNPCs = false

--

h = script.Parent.Parent:WaitForChild("Humanoid")
pathService = game:GetService("PathfindingService")
targetV = script.Parent:WaitForChild("Target")

function closestTargetAndPath()
	local humanoids = {}
	if targetNPCs then
		local function recurse(o)
			for _,obj in pairs(o:GetChildren()) do
				if obj:IsA("Model") then
					if obj:findFirstChild("Humanoid") and obj:findFirstChild("Torso") and obj.Humanoid ~= h and obj.Humanoid.Health > 0 and not obj:findFirstChild("ForceField") then
						table.insert(humanoids,obj.Humanoid)
					end
				end
				recurse(obj)
			end
		end
		recurse(workspace)
	else
		for _,v in pairs(game.Players:GetPlayers()) do
			if v.Character and v.Character:findFirstChild("HumanoidRootPart") and v.Character:findFirstChild("Humanoid") and v.Character.Humanoid.Health > 0 and not v:findFirstChild("ForceField") then
				table.insert(humanoids,v.Character.Humanoid)
			end
		end
	end
	local closest,path,dist
	for _,humanoid in pairs(humanoids) do
		local myPath = pathService:ComputeRawPathAsync(h.Torso.Position,humanoid.Torso.Position,500)
		if myPath.Status ~= Enum.PathStatus.FailFinishNotEmpty then
			-- Now that we have a successful path, we need to figure out how far we need to actually travel to reach this point.
			local myDist = 0
			local previous = h.Torso.Position
			for _,point in pairs(myPath:GetPointCoordinates()) do
				myDist = myDist + (point-previous).magnitude
				previous = point
			end
			if not dist or myDist < dist then -- if true, this is the closest path so far.
				closest = humanoid
				path = myPath
				dist = myDist
			end
		end
	end
	return closest,path
end

function goToPos(loc)
	h:MoveTo(loc)
	local distance = (loc-h.Torso.Position).magnitude
	local start = tick()
	while distance > 4 do
		if tick()-start > distance/h.WalkSpeed then -- Something may have gone wrong. Just break.
			break
		end
		distance = (loc-h.Torso.Position).magnitude
		wait()
	end
end

while wait() do
	local target,path = closestTargetAndPath()
	local didBreak = false
	local targetStart
	if target and h.Torso then
		targetV.Value = target
		targetStart = target.Torso.Position
		roaming = false
		local previous = h.Torso.Position
		local points = path:GetPointCoordinates()
		local s = #points > 1 and 2 or 1
		for i = s,#points do
			local point = points[i]
			if didBreak then 
				break
			end
			if target and target.Torso and target.Health > 0 then
				if (target.Torso.Position-targetStart).magnitude < 1.5 then
					local pos = previous:lerp(point,.5)
					local moveDir = ((pos - h.Torso.Position).unit * 2)
					goToPos(previous:lerp(point,.5))
					previous = point
				end
			else
				didBreak = true
				break
			end
		end
	else
		targetV.Value = nil
	end
	if not didBreak and targetStart then
		goToPos(targetStart)
	end
end