<!--
{
  "availability" : [
    "watchOS: 6.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "WatchKit",
  "identifier" : "/documentation/WatchKit/WKExtendedRuntimeSessionInvalidationReason",
  "metadataVersion" : "0.1.0",
  "role" : "Enumeration",
  "symbol" : {
    "kind" : "Enumeration",
    "modules" : [
      "WatchKit"
    ],
    "preciseIdentifier" : "c:@E@WKExtendedRuntimeSessionInvalidationReason"
  },
  "title" : "WKExtendedRuntimeSessionInvalidationReason"
}
-->

# WKExtendedRuntimeSessionInvalidationReason

The reasons why a session can become invalid.

```
enum WKExtendedRuntimeSessionInvalidationReason
```

## Overview

Sessions become invalid when they encounter an error, or when they stop running.

## Topics

### Invalidation Reasons

[`WKExtendedRuntimeSessionInvalidationReason.error`](/documentation/WatchKit/WKExtendedRuntimeSessionInvalidationReason/error)

An error prevented the session from running.

[`WKExtendedRuntimeSessionInvalidationReason.none`](/documentation/WatchKit/WKExtendedRuntimeSessionInvalidationReason/none)

The session ended normally.

[`WKExtendedRuntimeSessionInvalidationReason.sessionInProgress`](/documentation/WatchKit/WKExtendedRuntimeSessionInvalidationReason/sessionInProgress)

This app already has a running session.

[`WKExtendedRuntimeSessionInvalidationReason.expired`](/documentation/WatchKit/WKExtendedRuntimeSessionInvalidationReason/expired)

The session used all of its allocated time.

[`WKExtendedRuntimeSessionInvalidationReason.resignedFrontmost`](/documentation/WatchKit/WKExtendedRuntimeSessionInvalidationReason/resignedFrontmost)

The app lost its frontmost status.

[`WKExtendedRuntimeSessionInvalidationReason.suppressedBySystem`](/documentation/WatchKit/WKExtendedRuntimeSessionInvalidationReason/suppressedBySystem)

The system is in a state that doesn’t allow sessions of this type.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)