---
title: driverDevice
framework: coremidi
role: symbol
role_heading: Instance Property
path: coremidi/midiioerrornotification/driverdevice
---

# driverDevice

The device with an I/O error.

## Declaration

```swift
var driverDevice: MIDIDeviceRef
```

## See Also

### Inspecting an error notification

- [messageID](coremidi/midiioerrornotification/messageid.md)
- [messageSize](coremidi/midiioerrornotification/messagesize.md)
- [errorCode](coremidi/midiioerrornotification/errorcode.md)