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# CXError

Error codes for the CallKit errors.

```
struct CXError
```

## Topics

### Properties

### Constants

[`invalidArgument`](/documentation/CallKit/CXError/invalidArgument)

The argument is invalid.

[`unentitled`](/documentation/CallKit/CXError/unentitled)

The caller doesn’t have the correct entitlement.

[`unknownError`](/documentation/CallKit/CXError/unknownError)

An unknown error occurred.

### Operators

### Type Properties

[`missingVoIPBackgroundMode`](/documentation/CallKit/CXError/missingVoIPBackgroundMode)

### Enumerations

[`CXError.Code`](/documentation/CallKit/CXError/Code)

Error codes for the CallKit errors.


---

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