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# LockedCameraCaptureSession.ApplicationLaunchError

Indicates why launching the extension’s containing app failed.

```
enum ApplicationLaunchError
```

## Topics

### Enumeration Cases

[`case applicationNotFound`](/documentation/LockedCameraCapture/LockedCameraCaptureSession/ApplicationLaunchError/applicationNotFound)

An error that the launch failed because the system didn’t find the application.

[`case authenticationFailed`](/documentation/LockedCameraCapture/LockedCameraCaptureSession/ApplicationLaunchError/authenticationFailed)

An error that the launch failed because authentication failed and the device is locked.

[`case unknown`](/documentation/LockedCameraCapture/LockedCameraCaptureSession/ApplicationLaunchError/unknown)

An error that the launch failed with an unknown error.

### Instance Properties

[`var errorCode: Int`](/documentation/LockedCameraCapture/LockedCameraCaptureSession/ApplicationLaunchError/errorCode)

An integer value that represents the error code.

[`var failureReason: String?`](/documentation/LockedCameraCapture/LockedCameraCaptureSession/ApplicationLaunchError/failureReason)

A string that describes the error that occurred.

### Type Properties

[`static var errorDomain: String`](/documentation/LockedCameraCapture/LockedCameraCaptureSession/ApplicationLaunchError/errorDomain)

The domain for errors that can occur when launching the extension’s containing app.

## Relationships

### Conforms To

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

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

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

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

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

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

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

---

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