---
title: "LanguageModelError.unsupportedGenerationGuide(_:)"
framework: foundationmodels
role: symbol
role_heading: Case
path: "foundationmodels/languagemodelerror/unsupportedgenerationguide(_:)"
---

# LanguageModelError.unsupportedGenerationGuide(_:)

An unsupported generation guide was used

## Declaration

```swift
case unsupportedGenerationGuide(LanguageModelError.UnsupportedGenerationGuide)
```

## Discussion

Discussion This failure occurs if you attempt to use generation guides that a model does not support. For example, many models don’t support certain guides using certain regex patterns.

## See Also

### Generation guide unsupported error

- [LanguageModelError.UnsupportedGenerationGuide](foundationmodels/languagemodelerror/unsupportedgenerationguide.md)