---
title: "cancel(error:)"
framework: accessorytransportextension
role: symbol
role_heading: Instance Method
path: "accessorytransportextension/accessorytransportsession/cancel(error:)"
---

# cancel(error:)

Cancels the session.

## Declaration

```swift
func cancel(error: AccessoryTransportSession.Error?)
```

## Parameters

- `error`: An error that indicates the reason for cancellation.