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  "title" : "AccessoryControlDevice.Error"
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# AccessoryControlDevice.Error

An error that occurs during audio accessory configuration operations.

```
enum Error
```

## Overview

Use error cases to identify the cause of failures when registering devices or updating their state.

## Topics

### Error cases

[`case accessoryNotCapable`](/documentation/AudioAccessoryKit/AccessoryControlDevice/Error/accessoryNotCapable)

An error indicating the accessory doesn’t support the requested capability.

[`case invalidRequest`](/documentation/AudioAccessoryKit/AccessoryControlDevice/Error/invalidRequest)

An error indicating an invalid request.

[`case invalidated`](/documentation/AudioAccessoryKit/AccessoryControlDevice/Error/invalidated)

An error indicating a configuration that the system has invalidated.

[`case unknown`](/documentation/AudioAccessoryKit/AccessoryControlDevice/Error/unknown)

An error indicating an unknown error.

## Relationships

### Conforms To

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

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

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

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

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

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

---

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