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# QLThumbnailError

Error information that might return when you generate a thumbnail.

```
struct QLThumbnailError
```

## Topics

### Getting Information About the Error

### Error Codes

[`generationFailed`](/documentation/QuickLookThumbnailing/QLThumbnailError-swift.struct/generationFailed)

The thumbnail couldn’t be created for the given file.

[`noCachedThumbnail`](/documentation/QuickLookThumbnailing/QLThumbnailError-swift.struct/noCachedThumbnail)

A low-quality thumbnail couldn’t be created.

[`noCloudThumbnail`](/documentation/QuickLookThumbnailing/QLThumbnailError-swift.struct/noCloudThumbnail)

The thumbnail for a remote file couldn’t be created.

[`requestCancelled`](/documentation/QuickLookThumbnailing/QLThumbnailError-swift.struct/requestCancelled)

The request to create a thumbnail was canceled.

[`requestInvalid`](/documentation/QuickLookThumbnailing/QLThumbnailError-swift.struct/requestInvalid)

The request to create a thumbnail was invalid, for example, there’s no file at a provided URL.

[`savingToURLFailed`](/documentation/QuickLookThumbnailing/QLThumbnailError-swift.struct/savingToURLFailed)

The thumbnail couldn’t be saved at the given URL.

[`Code`](/documentation/QuickLookThumbnailing/QLThumbnailError-swift.struct/Code)

Error codes that may be returned when generating a thumbnail.

### Comparing Thumbnail Errors

## Relationships

### Conforms To

[`Sendable`](/documentation/Swift/Sendable)

[`Hashable`](/documentation/Swift/Hashable)

[`CustomNSError`](/documentation/Foundation/CustomNSError)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Equatable`](/documentation/Swift/Equatable)

[`Error`](/documentation/Swift/Error)

---

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