> For the complete documentation index, see [llms.txt](https://docs.ninjutsugames.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ninjutsugames.com/game-creator-2/fusion-module/references/shutdown-reasons.md). # Shutdown Reasons Describes a list of Reason why the Fusion Runner was Shutdown * **`Ok:`** means Fusion was Shutdown by request * **`Error:`** Shutdown was caused by some internal error * **`IncompatibleConfiguration:`** Raised when the peer tries to Join a Room with a mismatching type between ClientServer Mode and Shared Mode. * **`ServerInRoom:`** Raised when the local peer started as a Server and tried to join a Room that already has a Server peer. * **`DisconnectedByPluginLogic:`** Raised when the Peer is disconnected or kicked by a Plugin Logic. * **`GameClosed:`** Raised when the Game the Peer is trying to Join is Closed * **`GameNotFound:`** Raised when the Game the Peer is trying to Join does not exist * **`InvalidRegion:`** Raised when the peer is trying to connect to an unavailable or non-existent Region * **`GameIdAlreadyExists:`** Raised when a Session with the same name was already created * **`GameIsFull:`** Raised when a peer is trying to join a Room with already the max capacity of players * **`InvalidAuthentication:`** Raised when the Authentication Values are invalid * **`CustomAuthenticationFailed:`** Raised when the Custom Authentication has failed for some other reason * **`AuthenticationTicketExpired:`** Raised when the Authentication Ticket has expired * **`PhotonCloudTimeout:`** Timeout on the Connection with the Photon Cloud * **`AlreadyRunning:`** Raised when Fusion is already running and the StartGame is invoked again * **`InvalidArguments:`** Raised when any of the StartGame arguments does not meet the requirements * **`HostMigration:`** Signal this Runner is shutting down because of a Host Migration is about to happen * **`ConnectionTimeout:`** Connection with a remote server failed by timeout * **`ConnectionRefused:`** Connection with a remote server failed because it was refused * **`OperationTimeout:`** The current operation has timed out * **`OperationCanceled:`** The current operation was canceled --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.ninjutsugames.com/game-creator-2/fusion-module/references/shutdown-reasons.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.