---
title: "VisionError.unsupportedRevision(_:)"
framework: vision
role: symbol
role_heading: Case
path: "vision/visionerror/unsupportedrevision(_:)"
---

# VisionError.unsupportedRevision(_:)

An error that indicates an app specifies a request revision the framework doesn’t support.

## Declaration

```swift
case unsupportedRevision(String)
```

## See Also

### Getting the unsupported error

- [VisionError.unsupportedComputeDevice(_:)](vision/visionerror/unsupportedcomputedevice(_:).md)
- [VisionError.unsupportedComputeStage(_:)](vision/visionerror/unsupportedcomputestage(_:).md)
- [VisionError.unsupportedRequest(_:)](vision/visionerror/unsupportedrequest(_:).md)