---
title: MusicLibrary.Error
framework: musickit
role: symbol
role_heading: Enumeration
path: musickit/musiclibrary/error
---

# MusicLibrary.Error

An error that the music library can throw upon accessing, manipulating, or requesting data from the user’s music library.

## Declaration

```swift
enum Error
```

## Topics

### Enumeration Cases

- [MusicLibrary.Error.addToPlaylistFailed](musickit/musiclibrary/error/addtoplaylistfailed.md)
- [MusicLibrary.Error.createPlaylistFailed](musickit/musiclibrary/error/createplaylistfailed.md)
- [MusicLibrary.Error.editPlaylistFailed](musickit/musiclibrary/error/editplaylistfailed.md)
- [MusicLibrary.Error.itemAlreadyAdded](musickit/musiclibrary/error/itemalreadyadded.md)
- [MusicLibrary.Error.permissionDenied](musickit/musiclibrary/error/permissiondenied.md)
- [MusicLibrary.Error.playlistNotInLibrary](musickit/musiclibrary/error/playlistnotinlibrary.md)
- [MusicLibrary.Error.unableToAddItem](musickit/musiclibrary/error/unabletoadditem.md)
- [MusicLibrary.Error.unknown](musickit/musiclibrary/error/unknown.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Error](swift/error.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [LocalizedError](foundation/localizederror.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)