---
title: "USDPreviewSession.Event.error(_:)"
framework: spatialpreview
role: symbol
role_heading: Case
path: "spatialpreview/usdpreviewsession/event/error(_:)"
---

# USDPreviewSession.Event.error(_:)

Session error (editing read-only stage, etc.)

## Declaration

```swift
case error(USDPreviewSession.Error)
```