---
title: AVAudioEngineManualRenderingError.notRunning
framework: avfaudio
role: symbol
role_heading: Case
path: avfaudio/avaudioenginemanualrenderingerror/notrunning
---

# AVAudioEngineManualRenderingError.notRunning

An operation the system can’t perform because the engine isn’t running.

## Declaration

```swift
case notRunning
```

## See Also

### Manual Rendering Errors

- [AVAudioEngineManualRenderingError.initialized](avfaudio/avaudioenginemanualrenderingerror/initialized.md)
- [AVAudioEngineManualRenderingError.invalidMode](avfaudio/avaudioenginemanualrenderingerror/invalidmode.md)