---
title: MIDINotificationMessageID.msgIOError
framework: coremidi
role: symbol
role_heading: Case
path: coremidi/midinotificationmessageid/msgioerror
---

# MIDINotificationMessageID.msgIOError

A driver I/O error occurred.

## Declaration

```swift
case msgIOError
```

## See Also

### Change Types

- [MIDINotificationMessageID.msgSetupChanged](coremidi/midinotificationmessageid/msgsetupchanged.md)
- [MIDINotificationMessageID.msgObjectAdded](coremidi/midinotificationmessageid/msgobjectadded.md)
- [MIDINotificationMessageID.msgObjectRemoved](coremidi/midinotificationmessageid/msgobjectremoved.md)
- [MIDINotificationMessageID.msgPropertyChanged](coremidi/midinotificationmessageid/msgpropertychanged.md)
- [MIDINotificationMessageID.msgThruConnectionsChanged](coremidi/midinotificationmessageid/msgthruconnectionschanged.md)
- [MIDINotificationMessageID.msgSerialPortOwnerChanged](coremidi/midinotificationmessageid/msgserialportownerchanged.md)