# Help **URL:** https://community.coherence.io/c/help/12.md [Latest](https://community.coherence.io/latest.md) · [Categories](https://community.coherence.io/categories.md) --- ## [Get help with coherence](https://community.coherence.io/t/get-help-with-coherence/90)
**Author:** [@per\_coh](https://community.coherence.io/u/per_coh)\ **Replies:** 0\ **Last updated:** [August 19, 2022, 7:32am UTC](https://community.coherence.io/t/get-help-with-coherence/90 "2022-08-19T07:32:57Z")
Hi everyone. Ask any coherence question(s) and we’ll try and help. One thread per issue It really helps if you post one thread for one issue; that way we can keep better track of what’s solved and what’s still open. I… --- ## [Null ref on shutdown in RoomsDialogUI](https://community.coherence.io/t/null-ref-on-shutdown-in-roomsdialogui/808)
**Author:** [@owda](https://community.coherence.io/u/owda)\ **Replies:** 1\ **Last updated:** [July 1, 2026, 9:30am UTC](https://community.coherence.io/t/null-ref-on-shutdown-in-roomsdialogui/808 "2026-07-01T09:30:38Z")
This happens in OnDisable when trying to deregister a callback: ReplicationServerSystem.Instance.OnConnectionError -= OnConnectionError; The code should check that the replication server system instance is not null. … --- ## [Client-hosting world vs room setup](https://community.coherence.io/t/client-hosting-world-vs-room-setup/803)
**Author:** [@raymondnew](https://community.coherence.io/u/raymondnew)\ **Replies:** 4\ **Last updated:** [April 9, 2026, 8:39am UTC](https://community.coherence.io/t/client-hosting-world-vs-room-setup/803 "2026-04-09T08:39:17Z")
Hi there! I’m new to Coherence here! I am trying to setup a client-hosting p2p system for my application and is bundling up the replication server into the build. In the example provided in the Implementing Client-Hostin… --- ## [Can Coherence Lobbies Support Team-Based Matchmaking (e.g., pre-made 2–3 player teams into 3v3 matches)?](https://community.coherence.io/t/can-coherence-lobbies-support-team-based-matchmaking-e-g-pre-made-2-3-player-teams-into-3v3-matches/793)
**Author:** [@sota.gamify](https://community.coherence.io/u/sota.gamify)\ **Replies:** 2\ **Last updated:** [March 1, 2026, 8:03pm UTC](https://community.coherence.io/t/can-coherence-lobbies-support-team-based-matchmaking-e-g-pre-made-2-3-player-teams-into-3v3-matches/793 "2026-03-01T20:03:28Z")
Hello, We have reviewed the Coherence Lobbies documentation ( Lobbies | coherence Documentation ) and understand that the FindOrCreateLobby method can be used with custom filter expressions to match players into differe… --- ## [Lobby service questions](https://community.coherence.io/t/lobby-service-questions/789)
**Author:** [@Neodamus](https://community.coherence.io/u/Neodamus)\ **Replies:** 15\ **Last updated:** [January 21, 2026, 3:42pm UTC](https://community.coherence.io/t/lobby-service-questions/789 "2026-01-21T15:42:25Z")
I’ve read over the Lobbies docs, and it has some features I want to add, but I’m not sure I can get the exact result I’m looking for based on what it says, so heres what I imagine and what I’m curious about. Our game is… --- ## [Local RS configuration: max rooms](https://community.coherence.io/t/local-rs-configuration-max-rooms/787)
**Author:** [@Neodamus](https://community.coherence.io/u/Neodamus)\ **Replies:** 3\ **Last updated:** [December 8, 2025, 10:01pm UTC](https://community.coherence.io/t/local-rs-configuration-max-rooms/787 "2025-12-08T22:01:04Z")
Is there any way to change the max rooms a local RS can have? It is currently 10, but I’d like to be able to make it a much larger number. This is specifically for testing. We have tests that run back-to-back in rapid s… --- ## [GGPO style 2p game, client gets increasing frequency of rollbacks over time](https://community.coherence.io/t/ggpo-style-2p-game-client-gets-increasing-frequency-of-rollbacks-over-time/782)
**Author:** [@hsallander](https://community.coherence.io/u/hsallander)\ **Replies:** 8\ **Last updated:** [November 24, 2025, 12:28pm UTC](https://community.coherence.io/t/ggpo-style-2p-game-client-gets-increasing-frequency-of-rollbacks-over-time/782 "2025-11-24T12:28:01Z")
Hi! We’re building a GGPO style 2p game. It’s timing sensitive and we’ve chosen to do it as a GGPO style implementation. The game is deterministic so the solution works well but we have a question about a scenario that w… --- ## [Synced Scene Loading](https://community.coherence.io/t/synced-scene-loading/777)
**Author:** [@erethan](https://community.coherence.io/u/erethan)\ **Replies:** 2\ **Last updated:** [November 20, 2025, 11:40am UTC](https://community.coherence.io/t/synced-scene-loading/777 "2025-11-20T11:40:39Z")
Hey everyone! Currently in the game I’m working on, I would like to “move” all clients (load another scene) but I’m observing, and inferring, that as the clients load the new scene they destroy their current synced obje… --- ## [Rollback/Determinism Questions!](https://community.coherence.io/t/rollback-determinism-questions/783)
**Author:** [@quackandcheese](https://community.coherence.io/u/quackandcheese)\ **Replies:** 0\ **Last updated:** [November 15, 2025, 8:11am UTC](https://community.coherence.io/t/rollback-determinism-questions/783 "2025-11-15T08:11:29Z")
In the documentation’s determinism/rollback page, it mentions that you should avoid “Relying on floating point numbers across different platforms” – how relevant is it in regards to Unity’s systems/how could this be avoi… --- ## [Parenting different instances of same prefab](https://community.coherence.io/t/parenting-different-instances-of-same-prefab/775)
**Author:** [@erethan](https://community.coherence.io/u/erethan)\ **Replies:** 1\ **Last updated:** [October 18, 2025, 12:53pm UTC](https://community.coherence.io/t/parenting-different-instances-of-same-prefab/775 "2025-10-18T12:53:28Z")
Can parenting different instances of the same networked prefab to the same parent cause an error of logid= ToolkitCommandNumCommandBindings whenever one of them send commands? For a more concrete example: The Nesting P… --- ## [Scene Transition Flow](https://community.coherence.io/t/scene-transition-flow/773)
**Author:** [@erethan](https://community.coherence.io/u/erethan)\ **Replies:** 7\ **Last updated:** [October 13, 2025, 1:03pm UTC](https://community.coherence.io/t/scene-transition-flow/773 "2025-10-13T13:03:24Z")
I implemented a scene transition in my game, and it seems to be working but I suspect that I’ve messed up something. Here is my scene flow: Application starts and before loading the first scene, Reflex (https://githu… --- ## [Getting the Authority client of a CoherenceSync component](https://community.coherence.io/t/getting-the-authority-client-of-a-coherencesync-component/772)
**Author:** [@erethan](https://community.coherence.io/u/erethan)\ **Replies:** 1\ **Last updated:** [October 8, 2025, 5:26pm UTC](https://community.coherence.io/t/getting-the-authority-client-of-a-coherencesync-component/772 "2025-10-08T17:26:04Z")
Hey! How to transfer the authority of a CoherenceSync A to the owner a CoherenceSync B? I’m looking for something like A.TransferAuthority(B.AuthorityClientId, AuthorityType.Full), but I can adapt as long as the state … --- ## [Bootstrapping synced managers](https://community.coherence.io/t/bootstrapping-synced-managers/770)
**Author:** [@erethan](https://community.coherence.io/u/erethan)\ **Replies:** 2\ **Last updated:** [October 8, 2025, 8:45am UTC](https://community.coherence.io/t/bootstrapping-synced-managers/770 "2025-10-08T08:45:05Z")
Hi everyone! How do I create a synced “manager-like” prefab? I would like to achieve something analogous to the sample scene 7\_PlayerSpawner’s SpawnManager.cs (version 1.8). However, the SpawnManager listens to onLiveQ… --- ## [Peer to peer with IP?](https://community.coherence.io/t/peer-to-peer-with-ip/751)
**Author:** [@Neodamus](https://community.coherence.io/u/Neodamus)\ **Replies:** 3\ **Last updated:** [September 2, 2025, 5:17pm UTC](https://community.coherence.io/t/peer-to-peer-with-ip/751 "2025-09-02T17:17:22Z")
I’m looking to add a peer to peer solution and bundle the RS with the build. Looking at the docs, it looks like there is no out-of-the-box supported method to connect to someone directly using IP address. Is that correc… --- ## [Can't trace the MissingReference](https://community.coherence.io/t/cant-trace-the-missingreference/741)
**Author:** [@Vallar](https://community.coherence.io/u/Vallar)\ **Replies:** 10\ **Last updated:** [September 2, 2025, 6:34am UTC](https://community.coherence.io/t/cant-trace-the-missingreference/741 "2025-09-02T06:34:28Z")
Hello folks, I am encountering a weird MissingReference exception with Coherence that I can’t piece together where it comes from. This is my code Script - Pastebin.com This is the error it produces Error - Pastebin.co… --- ## [Enemy Duplicates for Each Player That Joins](https://community.coherence.io/t/enemy-duplicates-for-each-player-that-joins/744)
**Author:** [@Syobon\_Karo](https://community.coherence.io/u/Syobon_Karo)\ **Replies:** 1\ **Last updated:** [August 22, 2025, 2:10pm UTC](https://community.coherence.io/t/enemy-duplicates-for-each-player-that-joins/744 "2025-08-22T14:10:01Z")
Hi, I’m working on a multiplayer game using Unity and Coherence. I’ve run into a problem where my enemy prefab duplicates every time a new player joins the game. I’m not spawning the enemy through code — it’s already pla… --- ## [Ball Interaction Delay and Authority Switching Issues](https://community.coherence.io/t/ball-interaction-delay-and-authority-switching-issues/733)
**Author:** [@ata.dikmen](https://community.coherence.io/u/ata.dikmen)\ **Replies:** 5\ **Last updated:** [August 4, 2025, 5:00pm UTC](https://community.coherence.io/t/ball-interaction-delay-and-authority-switching-issues/733 "2025-08-04T17:00:30Z")
Hi everyone, I’m currently working on a very simple football game prototype using Unity and Coherence, and I’m running into a key issue with ball interaction between players. The problem is that the player who owns the… --- ## [Delayed Simulator Connection in Cloud](https://community.coherence.io/t/delayed-simulator-connection-in-cloud/737)
**Author:** [@Neodamus](https://community.coherence.io/u/Neodamus)\ **Replies:** 4\ **Last updated:** [July 29, 2025, 7:21pm UTC](https://community.coherence.io/t/delayed-simulator-connection-in-cloud/737 "2025-07-29T19:21:18Z")
I’m looking to have a simulator automatically connect to any room that’s created on the Cloud. When using an AutoSimulatorConnection component, I can achieve this result; however, the player Client joins the room immedi… --- ## [Simulator in Cloud Room](https://community.coherence.io/t/simulator-in-cloud-room/736)
**Author:** [@ata.dikmen](https://community.coherence.io/u/ata.dikmen)\ **Replies:** 1\ **Last updated:** [July 29, 2025, 11:16am UTC](https://community.coherence.io/t/simulator-in-cloud-room/736 "2025-07-29T11:16:16Z")
Hi again, I’m trying to initialize a simulator in room that controls everything(players etc). I uploaded my simulator to cloud but when I enter the play mode in the editor there is no room in the UI list, if I create one… --- ## [Kinematic object is reacting to physics when it shouldn't](https://community.coherence.io/t/kinematic-object-is-reacting-to-physics-when-it-shouldnt/732)
**Author:** [@jonasdahlman](https://community.coherence.io/u/jonasdahlman)\ **Replies:** 3\ **Last updated:** [July 29, 2025, 11:01am UTC](https://community.coherence.io/t/kinematic-object-is-reacting-to-physics-when-it-shouldnt/732 "2025-07-29T11:01:49Z")
Hi, First of all, great job with Coherence – I really appreciate your work! :blush: I’ve run into an issue that I can’t seem to resolve. In my project, I have kinematic objects (blocks) with all Rigidbody constraints … --- ## [multiple lobbies problem](https://community.coherence.io/t/multiple-lobbies-problem/731)
**Author:** [@sota.gamify](https://community.coherence.io/u/sota.gamify)\ **Replies:** 1\ **Last updated:** [July 28, 2025, 7:23am UTC](https://community.coherence.io/t/multiple-lobbies-problem/731 "2025-07-28T07:23:09Z")
When a user calls FindOrCreateLobbyAsync multiple times to join multiple lobbies, they encounter the message “you cannot join more than three lobbies simultaneously.” How can I make the user leave the previously joined l… --- ## [Post Status Code 400 Failed when connecting to replication servers](https://community.coherence.io/t/post-status-code-400-failed-when-connecting-to-replication-servers/727)
**Author:** [@the0dox](https://community.coherence.io/u/the0dox)\ **Replies:** 5\ **Last updated:** [July 25, 2025, 9:57pm UTC](https://community.coherence.io/t/post-status-code-400-failed-when-connecting-to-replication-servers/727 "2025-07-25T21:57:06Z")
Hello, I’ve been working with Coherence on and off for a while now and appreciate the service it provides. I’ve recently run into an issue that is preventing editor and regular builds from connecting to the cloud replic… --- ## [About automatically joining the room after entering the lobby.](https://community.coherence.io/t/about-automatically-joining-the-room-after-entering-the-lobby/725)
**Author:** [@sota.gamify](https://community.coherence.io/u/sota.gamify)\ **Replies:** 3\ **Last updated:** [July 16, 2025, 11:08pm UTC](https://community.coherence.io/t/about-automatically-joining-the-room-after-entering-the-lobby/725 "2025-07-16T23:08:52Z")
Question : I read the OnPlaySessionStarted API, which says, “If a Callback is not supplied, coherence will automatically join the specified RoomData.” Does this mean that if I do not use lobbies.OnPlaySessionStarted += … --- ## [CCU Limit Despite Having Enough Credits (Free Plan)](https://community.coherence.io/t/ccu-limit-despite-having-enough-credits-free-plan/723)
**Author:** [@ahmed.chlagou](https://community.coherence.io/u/ahmed.chlagou)\ **Replies:** 1\ **Last updated:** [July 14, 2025, 10:59am UTC](https://community.coherence.io/t/ccu-limit-despite-having-enough-credits-free-plan/723 "2025-07-14T10:59:06Z")
Hi team, I’m on the free plan and currently seeing the error: “You hit the CCU limit” when trying to connect to a room. According to the usage panel, I’ve only used 983 credits (9%) out of 10,000, and I still have… --- ## [InvalidChallenge when syncing a Command](https://community.coherence.io/t/invalidchallenge-when-syncing-a-command/722)
**Author:** [@joaosdev](https://community.coherence.io/u/joaosdev)\ **Replies:** 4\ **Last updated:** [July 6, 2025, 6:34pm UTC](https://community.coherence.io/t/invalidchallenge-when-syncing-a-command/722 "2025-07-06T18:34:49Z")
Hello, I’m developing a peer to peer multiplayer game using client hosting and Steam Relay. Everything works so far, but having a hard time setting up the first Command. This is my setup inside Player.cs private v… --- ## [Simulator setup in one of your images?](https://community.coherence.io/t/simulator-setup-in-one-of-your-images/721)
**Author:** [@gamegater](https://community.coherence.io/u/gamegater)\ **Replies:** 1\ **Last updated:** [June 29, 2025, 9:52am UTC](https://community.coherence.io/t/simulator-setup-in-one-of-your-images/721 "2025-06-29T09:52:59Z")
What is the simulator setup in the top image on this page. Overview | coherence Documentation I think you setup two scenes, one for each simulator, and then you created a portal jump between simulators? Or is there a c… --- ## [Simulator World Loading](https://community.coherence.io/t/simulator-world-loading/712)
**Author:** [@gamegater](https://community.coherence.io/u/gamegater)\ **Replies:** 5\ **Last updated:** [June 25, 2025, 8:01pm UTC](https://community.coherence.io/t/simulator-world-loading/712 "2025-06-25T20:01:57Z")
Good morning, Still wrapping my head around this. Ok, we have established the following: An external data source is required for permanent storage of info. Character management can be done between Login and joining … --- ## [Client connections](https://community.coherence.io/t/client-connections/714)
**Author:** [@gamegater](https://community.coherence.io/u/gamegater)\ **Replies:** 4\ **Last updated:** [June 25, 2025, 11:28pm UTC](https://community.coherence.io/t/client-connections/714 "2025-06-25T23:28:18Z")
I took a look at the point and click to move a server character video. It uses client connections. But in the documentation is says the following, The global nature of ClientConnections doesn’t fit all game types - f… --- ## [Datafiles on Simulation/Servers](https://community.coherence.io/t/datafiles-on-simulation-servers/711)
**Author:** [@gamegater](https://community.coherence.io/u/gamegater)\ **Replies:** 1\ **Last updated:** [June 24, 2025, 11:40pm UTC](https://community.coherence.io/t/datafiles-on-simulation-servers/711 "2025-06-24T23:40:31Z")
If I create datafiles that a simulation uses, they have to be part of the simulation build, correct? If I wanted to create a save state file for something that happened randomly and later access that at some unknown tim… --- ## [Character Creator Concept](https://community.coherence.io/t/character-creator-concept/710)
**Author:** [@gamegater](https://community.coherence.io/u/gamegater)\ **Replies:** 3\ **Last updated:** [June 24, 2025, 1:24pm UTC](https://community.coherence.io/t/character-creator-concept/710 "2025-06-24T13:24:51Z")
Hi, still evaluating coherence. Now trying to wrap my head around a character creator. So, once I have connected to the cloud, I am thinking I need to create a 1 player lobby. Though this lobby I can access the cloud … [Next page](https://community.coherence.io/c/help/12.md?page=1)