Your connection to the host has been lost

[Strelok]

Clocked many wonderful hours on this game, but it seems that it's at an end. Any time I attempt to join a server with less than 5 people on it, after about 5 minutes it gives me a "your connection to the host has been lost" error. I can join servers with more people on them, however. My friend on the same ISP can join these servers easily. Deleting the red orchestra 2 folder in the my games folder hasn't done anything to fix the problem. Game cache has been verified. What gives? Can no longer play on all of my favorite servers.

[Bad Wolf]

You could try to uninstall it,delete it and redownload it.If it still isnt fixed its propably something on your end.

[R5CYA]

i'd be talking to my internet service provider to find out why you're losing your connection. you're not on wireless are you? if so, maybe the modem got moved or something, causing a weaker signal.
p.s. i'd never even think of playing this game wireless.

[Münster Mike]

Uh, I don't know how to help, but the ad-hoc solution seems obvious: Join servers with more than 5 players...

[R5CYA]

you don't really think the amount of players has anything to do with it, do you? i think that's just a coincidence.

[Münster Mike]

It's the classic joke... I told my doctor it hurts when I laugh... doctor said, "Don't Laugh".

[yung malaria]

Well I play Ro2 on a Wireless PC and I only have that problem when my signal is weak, but in the last few days I've notice random lag spikes. I don't know i'd say if your running wireless get close as possible to your receiver or buy an internet booster run TS or Skype and see if you lag on that if thats the case it's your internet. Anything else, out of my knowledge. hope this help.

[Strelok]

Thank you for your replies, everyone.
It's not as though I get into the server and then get booted after 5 minutes -- it spends 5 minutes attempting to connect before displaying the error message. Like I said, a friend who is on the same ISP can join these servers easily, so I doubt it's the internet service provider. I play with a wired connection, 50 mb/s.

[R5CYA]

having a friend who uses the same service isn't proof of anything, except that you both send your check to the same place. having said that, since you are on a wired connection, it's probably not your internet connection. i'd run some tests and see how good the connection is, anyway.
i'm confused when you say it only happens with server with less than 5 people. for the life of me, i can't see what difference that would make.
there's a few other things to try in the Tech FAQ that you didn't mention trying, so i'll post them here for you.

How to resolve MOST issues with Punkbuster (e.g. “Punkbuster communication failure”):
MAKE SURE TO CHECK YOUR FIREWALL SETTINGS FIRST:
1) Open the Windows Start menu and find
Control Panel > Windows Firewall
2) Click where it says "Allow a program or feature through Windows Firewall"
3) Look for the following and make sure they are all allowed through:
- Rising Storm/Red Orchestra 2 Multiplayer
- PnkBstrA
- PnkBstrB

METHOD 1:
1) Open the Windows Start menu and find
Control Panel > Administrative Tools > Services
2) Look for the services PnkBstrA and PnkBstrB
3) Make sure both services are started. Start both services in case they are stopped.

METHOD 2:
1) Navigate to this folder:
C:\Program Files (x86)\Steam\steamapps\common\Red Orchestra 2\Binaries\Windows
2) Run pbsvc_hos to reinstall punkbuster.

METHOD 3:
1) Go to:
http://www.evenbalance.com/?page=pbsetup.php
2) Download PBsetup for your appropriate operating system.
3) Run the installer and make sure to set it to 'Red Orchestra 2.'

In case none of the methods above work:
1) Open your 'Control Panel'
2) Find and click 'Programs and Features'
3) Find 'Punkbuster Services' and unistall
4) Retry the methods 2 or 3 above
-------------------------------------------------------------------------------------------------------------------------------------

If the server browser comes up empty or connecting to a server takes forever.
NOTE: Make sure that your version of Windows is up to date! You can download the Windows 7 Service Pack 1 here: http://windows.microsoft.com/en-us/windows/service-packs-download#sptabs=win7

METHOD 1:
1) Check your server browser filters!
2) Make sure to unblock the game from your firewall.
3) Check to make sure it's also unblocked from any security software you may have installed.

METHOD 2:
Update punkbuster!
Read the Punkbuster issues section for details on how to do so.

METHOD 3:
WARNING: This method might reset your Steam client settings, so back up the file just in case.
1) Navigate to:
C:\Program Files (x86)\Steam
2) Delete the file named "ClientRegistry.blob"

METHOD 4:
Here's a handy video tutorial that just might help with connection issues:

YouTube™ Video: Killing Floor / Monday Night Combat / Rising Storm BT Home Hub and Thomson router telnet fix
Views: 25,570
A fix for the players and enemies walking into walls glitch when you join a server on the above games. Original thread: http://forums.tripwireinteractive.com/showthread.php?t=38891 Telnet thread:...

More details here: http://forums.tripwireinteractive.com/showthread.php?t=67759

METHOD 5:
Lower your Steam max pings per minute:
Some modems can't handle pinging so many servers so lowering this setting might help.
1) Steam > Settings > In-game
2) Lower the "Game server browser: max pings / minute" setting until it reliably shows servers in the server browser each time.
You might have to restart your modem if the server browser comes up with nothing.
-------------------------------------------------------------------------------------------------------------------------------------
and finally,

If all of the above hasn't helped you can try this:

Solution 1
Your shader cache might be corrupt, and will have to be re-downloaded. This can also solve issues pertaining to graphic glitches like black skies, or invisible terrain.
- Delete the RefShaderCache-PC-D3D-SM3.upk inside \Steam\steamapps\common\red orchestra 2\ROGame\Content

Solution 2
Your exe or binaries might have become corrupt after an update:
- Delete ROGame.exe inside \Steam\steamapps\common\red orchestra 2\Binaries\Win32
- If just deleting the ROGame.exe does not solve it, delete the entire Binaries folder. (Binaries folder is 262mb)