RuntimeNavMeshBuilder: Source mesh Combined Mesh (root: scene) does not allow read access.

Hey guys, I'm getting this error when I run Bake on a NavMeshSurface:

Code (CSharp):

1. RuntimeNavMeshBuilder: Source mesh Combined Mesh (root: scene) does not allow read access. This will work in playmode in the editor but not in player
2. UnityEngine.AI.NavMeshSurface:BuildNavMesh()
3. <RebuildingNavmesh>c__Iterator7:MoveNext() (at Assets/Scripts/Minigame1/SecurityGame.cs:661)
4. UnityEngine.MonoBehaviour:StartCoroutine(IEnumerator)
5. SecurityGame:RebakeNavmesh() (at Assets/Scripts/Minigame1/SecurityGame.cs:656)
6. <PlacingFence>c__Iterator8:MoveNext() (at Assets/Scripts/Minigame1/SecurityGame.cs:695)
7. UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)

As far as I can tell there's no "combined mesh" in my scene (what is that, even?). If so, how could I find it..? I know that sounds stupid but there's just a few meshes turned on in my scene and upon looking at them I can't find "Combined" anywhere. I also have a cube (the ground with the NavMeshSurface) and a terrain (this is just for background visuals, it's not on the layer used by the NavMeshSurface).

 

You are somehow trying to change the combined mesh, which is stored in memory when you initialize your navMesh. Can you show the code in SecurityGame of the methods that contain the highlighted lines? (661, 656, 695)

 

Is the object marked as static? I got this error while trying to build a navmesh out of multiple level objects (a ground plane and some buildings). I turned off static for all of the objects (and their children) and the error went away.

 

having the same Problem, it does work if I use "Physics Colliders" as "use Geometry" option. But actually I want to use "Render Meshes"

 

err, yeah, my meshes need to be static for rendering.

I found I still get the error when I choose Physics Colliders. I'm on 2019.2.9f1 right now

 

I had the same issue when I changed assets to non-static (non-navigation static), it worked perfectly.

 

Batching Static needs to be disabled

 

Go to Project Settings >Player Settings->Other Settings and deselect "Static Batching"

 

Thank you this worked!

 

It works, how do you realize of such a think?

 

Since disabling static batching might (or might not) be a "desperate" measure that gives up performance we tried another possibly desperate measure that I hope doesn't sacrifice anything (although it probably is a bad idea and very destructive):

In the Project Window's search bar, just search

t:Model

and then Ctrl-A to select every model.

This is a bit destructive, but if you select Read/Write and hit apply it just honestly works.
I was thinking I also had problems with other models not being Read/Write in other instances, specially when importing from Blender so we thought: why not if I'm going to need it for new models anyways?

 

Works in Linux 2021.3.20f1 if I use physics colliders. This should be ok for my situation.