# GrammarCompilationFailure

> Speech recognition engine failed to compiled specified grammar.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.Windows.Speech](/engine/6000.3/script-reference/unityengine/windows/speech.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
GrammarCompilationFailure = 3
```

### Remarks

This error usually happens if an invalid grammar file is supplied to a grammar recognizer.