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

# TelephonyMessagingSession.Error

An enumeration of errors that can result from operations on a messaging session.

## Declaration

```swift
enum Error
```

## Topics

### Inspecting errors

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

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [Decodable](swift/decodable.md)
- [Encodable](swift/encodable.md)
- [Equatable](swift/equatable.md)
- [Error](swift/error.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [LocalizedError](foundation/localizederror.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)