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Extremely high client desync after upgrading dedicated server to 1.26
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After upgrading my dedicated server to 1.26, all players in the server are suffering from extremely high desync (near 100k). The server even crashes after running for a few hours.


Legacy ID
Steps To Reproduce
  1. Create a dedicated server using attached pbo and @inidbi mod.
  2. Join the server and play.

Event Timeline

Jermin edited Steps To Reproduce. (Show Details)Aug 21 2014, 3:48 AM
Jermin edited Additional Information. (Show Details)
Jermin set Category to Server.
Jermin set Reproducibility to Always.
Jermin set Severity to None.
Jermin set Resolution to Duplicate.
Jermin set Legacy ID to 157832641.May 7 2016, 7:16 PM
santa added a subscriber: santa.May 7 2016, 7:16 PM

(As a player) I have the same problem. I only saw about 3-5 people with a normal desync. This might the reason why I can't see helicopters in multiplayer.

Fepaje added a subscriber: Fepaje.May 7 2016, 7:16 PM

Same problem here. Before the update there were 0 lag/desync issues on my server with 50 players. Now about 3/4 of the players have a 100k desync and helicopters are glitching and floating in the air.

Levia added a subscriber: Levia.May 7 2016, 7:16 PM
Levia added a comment.Aug 22 2014, 8:32 AM

Same here. Server with >80 people desyncs badly after a while

I am getting the same, running 2 servers and since the update both get desync and lag issues around 40 - 50 players

Dwarden added a subscriber: Dwarden.May 7 2016, 7:16 PM

please add to your server.cfg this option
guaranteedUpdates = false;

tell us if it have any effect
but make sure you tested it in depth to be sure

as it may not help
cause in 1.27 DEV branch there are new additional desync fixes

santa added a comment.Aug 22 2014, 1:24 PM

Hellow Dwarden,

I can try add this line.

Later i tell u.

Sorry bad english.

santa added a comment.Aug 22 2014, 1:37 PM


I try this line and is same.

I have 100k desyncs.

TLU added a comment.Aug 22 2014, 2:29 PM

Dwarden nothing seems to be working i've changed my basic.cfg and also put guaranteedUpdates = false;

Doesnt matter how many players are on the server just happens after 1 hour of uptime max desync for most then it may go if we are lucky then it will only come back but it will hit us all

santa added a comment.Aug 22 2014, 6:45 PM

I need any solution i can`t play now.

No one can play on any mission. Even on my server there is a very high desync after the last patch released.

TLU added a comment.Aug 22 2014, 8:26 PM

They should release a fix very soon

AntonyJ added a subscriber: AntonyJ.May 7 2016, 7:16 PM

I'm having the same problem on my server, After a short while (usually about 40-50mins) the whole server starts to have massive desync, Nothing you have sugested here works, When do you think a fix will be released?

Please help us out here! We all at the Breaking Point community are in shambles over this last update! The desync is absolutely gamebreaking. Thanks guys and good luck finding the problem.

Even if they fix it, I don't think they will release a stable branch update any time soon.

We really need a fix for this one. Now it's almost impossible to play on my dedicated and we're suffering a huge player loss (~30-40 players). Please fix this asap!

I like many others have been suffering from massive amounts of desync ever since the last update... All of arma 3 MP is completely unplayable for me.. This needs to be fixed ASAP

Same. Desync even with 10-20 people, no matter which server and gametype.

can you guys actually test shit before releasing it

did you do this on purpose to try and force us to spend more money on standalone?


guaranteedUpdates = false;

helped a lot on our server as far as i can tell. before this config line we had high desyncs even shortly after a server restart.

with the value set it helped a lot and everything looks smooth again (30 minutes uptime without problems now)
i don't know how it looks with higher playercounts as there are now >10 players due to problems since patch.

maybe the issues occur if the network parameters for the server are tweaked?
we are using modified settings to allow a higher player count on the server.

i update this post if i get updated info's.

MP is broken, thanks guys.

I played yesterday and my desync was 0, though I still couldn't see helicopters... Guess its not related to the desync error, or the menu was late or something.

Jermin added a subscriber: Jermin.May 7 2016, 7:16 PM

The weirdest part of the dysync issue is that some servers are affected while some aren't. This has made the players on my server shift to other normal servers.

Right now I have no clue how many of them will come back to my server, which used to have about 500 active players.

I've invested a lot of time and money on my ArmA 3 server. How would you react to the (very likely) player loss of many servers affected by this desync bug? I'd like to hear an official answer from BI Studio.

I can also confirm this issue with 80+ players, sometimes we can go an hour or two without any desync at all. All of a sudden the desync will kick in, people can't see anybody else moving & the server has to be restarted.

We get lots of erros like this spammed down the client side log when ever it happens, there seems to be no pattern to it's occurences.

0:48:36 Message not sent - error 0, message ID = ffffffff, to 1657523928 (WOLPAWEGG)
20:48:36 NetServer::SendMsg: cannot find channel #1657523928, users.card=90
20:48:36 NetServer: users.get failed when sending to 1657523928

This is all since the patch update. We never had desync before & have tried all of your config suggestions, unfortunately none have had any effect. This really needs to be fixed as we're losing players daily.