# AI_InvalidPromptError

This error occurs when the prompt provided is invalid.

## Potential Causes

### UI Messages

You are passing a `UIMessage[]` as messages into e.g. `streamText`.

You need to first convert them to a `ModelMessage[]` using `convertToModelMessages()`.

```typescript
import { type UIMessage, generateText, convertToModelMessages } from 'ai';

const messages: UIMessage[] = [
  /* ... */
];

const result = await generateText({
  // ...
  messages: await convertToModelMessages(messages),
});
```

## Properties

- `prompt`: The invalid prompt value
- `message`: The error message (required in constructor)
- `cause`: The cause of the error (optional)

## Checking for this Error

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

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

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


## Navigation

- [AI_APICallError](/docs/reference/ai-sdk-errors/ai-api-call-error)
- [AI_DownloadError](/docs/reference/ai-sdk-errors/ai-download-error)
- [AI_EmptyResponseBodyError](/docs/reference/ai-sdk-errors/ai-empty-response-body-error)
- [AI_InvalidArgumentError](/docs/reference/ai-sdk-errors/ai-invalid-argument-error)
- [AI_InvalidDataContentError](/docs/reference/ai-sdk-errors/ai-invalid-data-content-error)
- [AI_InvalidMessageRoleError](/docs/reference/ai-sdk-errors/ai-invalid-message-role-error)
- [AI_InvalidPromptError](/docs/reference/ai-sdk-errors/ai-invalid-prompt-error)
- [AI_InvalidResponseDataError](/docs/reference/ai-sdk-errors/ai-invalid-response-data-error)
- [AI_InvalidToolApprovalError](/docs/reference/ai-sdk-errors/ai-invalid-tool-approval-error)
- [AI_InvalidToolInputError](/docs/reference/ai-sdk-errors/ai-invalid-tool-input-error)
- [AI_JSONParseError](/docs/reference/ai-sdk-errors/ai-json-parse-error)
- [AI_LoadAPIKeyError](/docs/reference/ai-sdk-errors/ai-load-api-key-error)
- [AI_LoadSettingError](/docs/reference/ai-sdk-errors/ai-load-setting-error)
- [AI_MessageConversionError](/docs/reference/ai-sdk-errors/ai-message-conversion-error)
- [AI_NoContentGeneratedError](/docs/reference/ai-sdk-errors/ai-no-content-generated-error)
- [AI_NoImageGeneratedError](/docs/reference/ai-sdk-errors/ai-no-image-generated-error)
- [AI_NoObjectGeneratedError](/docs/reference/ai-sdk-errors/ai-no-object-generated-error)
- [AI_NoOutputGeneratedError](/docs/reference/ai-sdk-errors/ai-no-output-generated-error)
- [AI_NoSpeechGeneratedError](/docs/reference/ai-sdk-errors/ai-no-speech-generated-error)
- [AI_NoSuchModelError](/docs/reference/ai-sdk-errors/ai-no-such-model-error)
- [AI_NoSuchProviderError](/docs/reference/ai-sdk-errors/ai-no-such-provider-error)
- [AI_NoSuchToolError](/docs/reference/ai-sdk-errors/ai-no-such-tool-error)
- [AI_NoTranscriptGeneratedError](/docs/reference/ai-sdk-errors/ai-no-transcript-generated-error)
- [AI_NoVideoGeneratedError](/docs/reference/ai-sdk-errors/ai-no-video-generated-error)
- [AI_RetryError](/docs/reference/ai-sdk-errors/ai-retry-error)
- [AI_TooManyEmbeddingValuesForCallError](/docs/reference/ai-sdk-errors/ai-too-many-embedding-values-for-call-error)
- [AI_ToolCallNotFoundForApprovalError](/docs/reference/ai-sdk-errors/ai-tool-call-not-found-for-approval-error)
- [ToolCallRepairError](/docs/reference/ai-sdk-errors/ai-tool-call-repair-error)
- [AI_TypeValidationError](/docs/reference/ai-sdk-errors/ai-type-validation-error)
- [AI_UIMessageStreamError](/docs/reference/ai-sdk-errors/ai-ui-message-stream-error)
- [AI_UnsupportedFunctionalityError](/docs/reference/ai-sdk-errors/ai-unsupported-functionality-error)


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