# UnknownError

> The mesh generation failed for unknown reasons.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.XR](/engine/6000.6/script-reference/unityengine/xr.md)
* **Assembly:** UnityEngine.XRModule

```csharp
UnknownError = 4
```

### Remarks

Additional Resources: [XRMeshSubsystem.GenerateMeshAsync](/engine/6000.6/script-reference/unityengine/xr/xrmeshsubsystem/generatemeshasync.md), [MeshGenerationResult](/engine/6000.6/script-reference/unityengine/xr/meshgenerationresult.md)