Upgraded Unity, now getting "Failed to create agent because it is not close enough to the NavMesh"

Unity Engine
1

I was using 2017.1.1f4 (or whatever the latest ‘official’) version is, and navigation was working fine, but since it crashed about 10 times daily I upgraded to the latest patch version, 2017.1.1.p4.

Now, the navigation doesn’t seem to work: I get told “Failed to create agent because it is not close enough to the Navmesh”. The navmesh still exists, I tried rebuilding it, but nothing works. I can get the character’s starting point within centimetres of the navmesh below it but I still get the “not close enough” error.

Anyone know what’s going on? I’ll have to revert to the ‘stable’ version until I can resolve this. (It does work as usual once I revert.)

2

I was having the same issue after upgrading from 2017.1 to 2017.2.0f3. The problem was solved after reviewing all the properties of agents and navmesh (I think the height and step-height of Humanoid agent were different from the right values) and baking the navmesh again.

3

Anyone have a resolution to this problem? I’m having the same issue after the upgrade. Almost ready to go back to the earlier version…

@aaforcebox:How did you you solve it by reviewing nav agent settings?

4

Take a look at: "Failed to create agent because it is not close enough to the Navmesh"

Then file an issue

5

If you are sure your mesh is fine but you’re still getting this error, then try those two things:

  1. Delay the spawning of your unit / navAgent until 2frames after the game has started / the scene has finished loading.
  2. When activating your navAgent try this:
            _navAgent.enabled = false;
            _navAgent.enabled = true;
            _navAgent.Warp(transform.position);

I don’t know why but this reliably solved the issue for me in all the scenarios it happened.

2 Likes
6

I filed a bug report, but the QA person didn’t bother to read it properly and closed it. He said:

"Unfortunately, this sounds more of a feature request than a bug. NavMesh itself seems to be working as intended.
Unless it’s your specific occasion, error does depend on the distance between NavMesh and NavMeshAgent (throwing an error starting at 9 units)."

The object is not even ONE unit away and I get this error. Very angry at their QA right now.

7

Just reply telling them that the object is in fact one unit away, not 9, no point in getting angry.

8

I did. But QA shouldn’t close issues without reading them.

9

Your expecting too much of unity QA, from what I hear they are always doing this sort of stuff.

10

Open another issue with a very small scene that clearly shows the problem. Maybe someone else will read it then :stuck_out_tongue:

11

I too get warning “Failed to create agent because it is not close enough to the Navmesh”. A see - prefab spawn similar NavMesh. 0_0
Then I use NavMesh.SamplePosition for get real NavMesh point. But no effect.
And I find root of this error - unHumanoid agent type!
I set agent type to Humanoid and script worked perfectly, without warning.
But what will done? I need different unHumanoid agents type!

1 Like
12

Sometimes the agent settings for that type don’t match the ones set on the navmesh itself. I don’t know why that would cause this problem, but sometimes it does. HOWEVER that is not the problem I have. I have Humanoid for everything.

13

try using navmesh agent warp and warp to same location

14

This code here actually worked for me, solving the problem completely. Unfortunately, there’s no way that I can shut off or get rid of the initial “failed to create navmeshagent” debug error now. I’ll just have to live with it.

For me it’s instantiating a prefab with a navmeshagent that made it so that it couldn’t create it. Any time one of my objects that needs to be instantiated is created now I get the problem.

15

In case anyone is trying to figure this out later, like I was, you can only use non-Humanoid agent types if you use NavMeshSurface from the nav components here: GitHub - Unity-Technologies/NavMeshComponents: High Level API Components for Runtime NavMesh Building