---
title: ProximityReaderDiscovery.ContentError.unknown
framework: proximityreader
role: symbol
role_heading: Case
path: proximityreader/proximityreaderdiscovery/contenterror/unknown
---

# ProximityReaderDiscovery.ContentError.unknown

An error that indicates the framework encountered a problem that the system can’t interpret.

## Declaration

```swift
case unknown
```

## See Also

### Getting the errors

- [ProximityReaderDiscovery.ContentError.contentNotFound](proximityreader/proximityreaderdiscovery/contenterror/contentnotfound.md)
- [ProximityReaderDiscovery.ContentError.contentDisplayFailed](proximityreader/proximityreaderdiscovery/contenterror/contentdisplayfailed.md)
- [ProximityReaderDiscovery.ContentError.notSupported](proximityreader/proximityreaderdiscovery/contenterror/notsupported.md)
- [ProximityReaderDiscovery.ContentError.networkUnavailable](proximityreader/proximityreaderdiscovery/contenterror/networkunavailable.md)
- [ProximityReaderDiscovery.ContentError.systemBusy](proximityreader/proximityreaderdiscovery/contenterror/systembusy.md)