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# ARError.Code.invalidReferenceImage

An error that indicates the framework fails to process a reference image.

```
case invalidReferenceImage
```

## Discussion

This error occurs when you supply a reference image to the configuration’s [`detectionImages`](/documentation/ARKit/ARWorldTrackingConfiguration/detectionImages) but ARKit determined it’s unusable. This can happen when the image data doesn’t contain enough features to identify a unique picture, for example, it’s all white.

---

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