---
title: MSCriticalMessagingError
framework: messages
role: symbol
role_heading: Enumeration
path: messages/mscriticalmessagingerror
---

# MSCriticalMessagingError

Values that describe errors the Critical Messaging API returns.

## Declaration

```swift
enum MSCriticalMessagingError
```

## Topics

### Error codes

- [MSCriticalMessagingError.unknown](messages/mscriticalmessagingerror/unknown.md)
- [MSCriticalMessagingError.invalidAuthenticationRequest](messages/mscriticalmessagingerror/invalidauthenticationrequest.md)
- [MSCriticalMessagingError.notSupported](messages/mscriticalmessagingerror/notsupported.md)
- [MSCriticalMessagingError.notAuthorized](messages/mscriticalmessagingerror/notauthorized.md)
- [MSCriticalMessagingError.sendFailed](messages/mscriticalmessagingerror/sendfailed.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomNSError](foundation/customnserror.md)
- [Equatable](swift/equatable.md)
- [Error](swift/error.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [LocalizedError](foundation/localizederror.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Errors

- [MSStickersErrorDomain](messages/msstickerserrordomain.md)
- [MSMessagesErrorDomain](messages/msmessageserrordomain.md)
- [MSMessageErrorCode](messages/msmessageerrorcode.md)