---
title: CFURLError.unknownSchemeError
framework: corefoundation
role: symbol
role_heading: Case
path: corefoundation/cfurlerror/unknownschemeerror
---

# CFURLError.unknownSchemeError

Indicates that the scheme is not recognized.

## Declaration

```swift
case unknownSchemeError
```

## See Also

### Constants

- [CFURLError.unknownError](corefoundation/cfurlerror/unknownerror.md)
- [CFURLError.resourceNotFoundError](corefoundation/cfurlerror/resourcenotfounderror.md)
- [CFURLError.resourceAccessViolationError](corefoundation/cfurlerror/resourceaccessviolationerror.md)
- [CFURLError.remoteHostUnavailableError](corefoundation/cfurlerror/remotehostunavailableerror.md)
- [CFURLError.improperArgumentsError](corefoundation/cfurlerror/improperargumentserror.md)
- [CFURLError.unknownPropertyKeyError](corefoundation/cfurlerror/unknownpropertykeyerror.md)
- [CFURLError.propertyKeyUnavailableError](corefoundation/cfurlerror/propertykeyunavailableerror.md)
- [CFURLError.timeoutError](corefoundation/cfurlerror/timeouterror.md)