> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# OnErrorEventHandler

> Reference for the OnError event handler on PlayFabMultiplayerManager in the Party Unity SDK, raised when the library reports a Party or network error.

Occurs when there is an error.

## Arguments

### sender (object)

The class that raised the event.

### args (PlayFabMultiplayerManagerErrorArgs)

An object that contains the details of the error.


## Related topics

- [PlayFabMultiplayer.OnError](/services/playfab/multiplayer/lobby/unity-multiplayer-api-reference/PlayFab.Multiplayer/PlayFabMultiplayer/OnError.md)
- [Class PlayFabMultiplayerManager](/services/playfab/multiplayer/networking/unity-party-api-reference/classes/playfabmultiplayermanager/index.md)
- [PlayFabMultiplayer class](/services/playfab/multiplayer/lobby/unity-multiplayer-api-reference/PlayFab.Multiplayer/PlayFabMultiplayer/overview.md)
- [PFEventPipelineBatchUploadFailedEventHandler](/services/playfab/api-references/c/pfeventpipeline/functions/pfeventpipelinebatchuploadfailedeventhandler.md)
- [Photon Quickstart](/services/playfab/live-service-management/service-gateway/add-ons/photon/quickstart.md)