# Unknown

> The query encountered an error and returned an unknown result. This should not happen unless a serious issue was encountered.

## Definition

* **Type:** Field
* **Namespace:** [Unity.U2D.Physics](/engine/6000.5/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
Unknown = 0
```