---
title: AdAttributionKitError.unknown
framework: AdAttributionKit
role: symbol
role_heading: Case
platforms: [iOS 17.4+, iPadOS 17.4+, Mac Catalyst 17.4+]
path: adattributionkit/adattributionkiterror/unknown
---

# AdAttributionKitError.unknown

The attribution failed due to an unknown, unrecoverable error.

## Declaration

```swift
case unknown
```