ai/docs/07-reference/05-ai-sdk-errors/ai-type-validation-error.mdx

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---
title: AI_TypeValidationError
description: Learn how to fix AI_TypeValidationError
---

# AI_TypeValidationError

This error occurs when type validation fails.

## Properties

- `value`: The value that failed validation
- `cause`: The underlying validation error (required in constructor)

## Checking for this Error

You can check if an error is an instance of `AI_TypeValidationError` using:

```typescript
import { TypeValidationError } from 'ai';

if (TypeValidationError.isInstance(error)) {
  // Handle the error
}
```