---
title: "HIDDeviceError.unknown(_:)"
framework: corehid
role: symbol
role_heading: Case
path: "corehid/hiddeviceerror/unknown(_:)"
---

# HIDDeviceError.unknown(_:)

A catch-all for uncommon errors.

## Declaration

```swift
case unknown(Int32)
```

## Discussion

Discussion The associated code is an IOReturn that provides additional information.