---
title: protocolFamilyNotSupported
framework: system
role: symbol
role_heading: Type Property
path: system/errno/protocolfamilynotsupported
---

# protocolFamilyNotSupported

Protocol family not supported.

## Declaration

```swift
static var protocolFamilyNotSupported: Errno { get }
```

## Mentioned in

Adopting Swift Error Constants

## Discussion

Discussion The protocol family hasn’t been configured into the system or no implementation for it exists. The corresponding C error is EPFNOSUPPORT.

## See Also

### Network Protocol Errors

- [protocolError](system/errno/protocolerror.md)
- [protocolNotAvailable](system/errno/protocolnotavailable.md)
- [protocolNotSupported](system/errno/protocolnotsupported.md)
- [protocolWrongTypeForSocket](system/errno/protocolwrongtypeforsocket.md)