---
title: applicationError
framework: network
role: symbol
role_heading: Instance Property
path: network/nwprotocolquic/metadata/applicationerror
---

# applicationError

The QUIC application error code to send for the connection, or received from the peer.

## Declaration

```swift
var applicationError: NWProtocolQUIC.ApplicationError { get set }
```

## See Also

### Handling Errors

- [NWProtocolQUIC.ApplicationError](network/nwprotocolquic/applicationerror.md)
- [streamApplicationErrorCode](network/nwprotocolquic/metadata/streamapplicationerrorcode.md)