# Invalid_File_Structure

> Error code returned by the LoadFontFace function when the source font file appears invalid or improperly formatted.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.TextCore.LowLevel](/engine/6000.5/script-reference/unityengine/textcore/lowlevel.md)
* **Assembly:** UnityEngine.TextCoreFontEngineModule

```csharp
Invalid_File_Structure = 3
```