"Attempt to index nil with 'GetWaypoints'" (Pathfinding)

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#1

Hi devs,

For some reason, I get the error “Attempt to index nil with ‘GetWaypoints’” whenever I use this code:

local path = game:GetService("PathfindingService"):CreatePath({AgentWidth = 2, AgentHeight = 5.75, AgentCanJump = false}):ComputeAsync(script.Parent.HumanoidRootPart.Position, nearestPlayer.HumanoidRootPart.Position)
waypoints = path:GetWaypoints()

The HumanoidRootPart’s position for both of the parameters isn’t nil.

#2

ComputeAsync doesn’t return anything
https://developer.roblox.com/en-us/api-reference/function/Path/ComputeAsync

GetWaypoints is a function of Path, so I’d pretty much do

local path = ...:CreatePath({...})
path:ComputeAsync(...)

waypoints = path:GetWaypoints()
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#3

Thanks, but now the character doesn’t go around walls.
Do you know how I could fix this?
Here’s the code I have:

local path = game:GetService("PathfindingService"):CreatePath({AgentWidth = 2, AgentHeight = 5.75, AgentCanJump = false})
local success, errormsg = pcall(function()
	path:ComputeAsync(script.Parent.HumanoidRootPart.Position, nearestPlayer.HumanoidRootPart.Position)
end)
if success then
	local waypoints = path:GetWaypoints()
	for _, i in waypoints do
		if (waypoints[#waypoints].Position - nearestPlayer.HumanoidRootPart.Position).Magnitude > 5 or not nearestPlayer then
			break
		end
		script.Parent.Humanoid:MoveTo(i.Position)
	end
end

Adding a MoveToFinished:Wait() also doesn’t work.

#4

I’m not sure in that case
MoveToFinished should be firing and idk what else you can use to check when the movement is done

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#5

I think it might be a problem with the path, rather than a MoveToFinished:Wait() problem.
e
(The circles are the path waypoints)

#6

did you make sure the walls are collidable or has canquery enabled?
also, idk the internals of the pathfinding service, but try again with the walls visible

1 Like
#7

I think the problem must have been that the walls were 0.25 thick, I made them bigger and now the character can go around them…

1 Like