---
title: unitRenderAction_PostRenderError
framework: audiotoolbox
role: symbol
role_heading: Type Property
path: audiotoolbox/audiounitrenderactionflags/unitrenderaction_postrendererror
---

# unitRenderAction_PostRenderError

If this flag is set on the post-render call an error was returned by the audio unit’s render operation. In this case, the error can be retrieved through the lastRenderError property and the audio data in ioData handed to the post-render notification will be invalid.

## Declaration

```swift
static var unitRenderAction_PostRenderError: AudioUnitRenderActionFlags { get }
```

## See Also

### Constants

- [unitRenderAction_PreRender](audiotoolbox/audiounitrenderactionflags/unitrenderaction_prerender.md)
- [unitRenderAction_PostRender](audiotoolbox/audiounitrenderactionflags/unitrenderaction_postrender.md)
- [unitRenderAction_OutputIsSilence](audiotoolbox/audiounitrenderactionflags/unitrenderaction_outputissilence.md)
- [offlineUnitRenderAction_Preflight](audiotoolbox/audiounitrenderactionflags/offlineunitrenderaction_preflight.md)
- [offlineUnitRenderAction_Render](audiotoolbox/audiounitrenderactionflags/offlineunitrenderaction_render.md)
- [offlineUnitRenderAction_Complete](audiotoolbox/audiounitrenderactionflags/offlineunitrenderaction_complete.md)
- [unitRenderAction_DoNotCheckRenderArgs](audiotoolbox/audiounitrenderactionflags/unitrenderaction_donotcheckrenderargs.md)