---
title: TelephonyMessagingSession.Error.invalidSession
framework: TelephonyMessagingKit
role: symbol
role_heading: Case
platforms: [iOS 26.0+]
path: telephonymessagingkit/telephonymessagingsession/error/invalidsession
---

# TelephonyMessagingSession.Error.invalidSession

The session is invalid.

## Declaration

```swift
case invalidSession
```

## See Also

### Inspecting errors

- [TelephonyMessagingSession.Error.serviceUnavailable](telephonymessagingkit/telephonymessagingsession/error/serviceunavailable.md)
- [TelephonyMessagingSession.Error.invalidArgument](telephonymessagingkit/telephonymessagingsession/error/invalidargument.md)
- [TelephonyMessagingSession.Error.internalError](telephonymessagingkit/telephonymessagingsession/error/internalerror.md)