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# ImageAnalysisInteraction.SubjectUnavailable

Error conditions that can occur during subject analysis.

```
enum SubjectUnavailable
```

## Overview

This enumeration contains a failure [`ImageAnalysisInteraction.SubjectUnavailable.imageUnavailable`](/documentation/VisionKit/ImageAnalysisInteraction/SubjectUnavailable/imageUnavailable) that can occur when the [`ImageAnalysisInteraction.Subject`](/documentation/VisionKit/ImageAnalysisInteraction/Subject) property [`image`](/documentation/VisionKit/ImageAnalysisInteraction/Subject/image) fails to produce a result.

## Topics

### Identifying an error cause

[`case imageUnavailable`](/documentation/VisionKit/ImageAnalysisInteraction/SubjectUnavailable/imageUnavailable)

An error that indicates the subject fails to produce an image.

### Inspecting error information

### Comparing errors

## Relationships

### Conforms To

[`Error`](/documentation/Swift/Error)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Hashable`](/documentation/Swift/Hashable)

[`Sendable`](/documentation/Swift/Sendable)

[`Equatable`](/documentation/Swift/Equatable)

---

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