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Red Alert 3 Co-Op always disconnects when starting map

ra3 red alert 3 co-op coop disconnect

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#1 KirovAirshipReporting

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Posted 12 January 2024 - 02:49 PM



I tried searching for a solution to this, but no luck. Hope I don't ask a trivial question, after checking the FAQ.


My friend and me are trying to play RA3 co-op. We both have the game from Steam. We manage to get to the briefing screen, and then hit play on the mission. The load screen appears. My friend always goes to 100% (even on his end) and I get stuck at 96% (last time he said it was something in the 60% range maybe on his end), then after a few seconds, I get this screen:




He gets a black screen. Neither of us can interact with the game any further, and it has to be killed from the task manager.

It does not matter who hosts, it's always the same. We tried the first Allied and Soviet maps, to the exact same result every time.


We can both play in single player without issues.


Help would be greatly appreciated.

#2 KirovAirshipReporting

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Posted 17 January 2024 - 01:32 PM

We both use Windows 10, and used the network testing tool, and it succeeded.


----- C&C:Online Launcher Start -----
Game: Red Alert 3
Red Alert 3 Install Path: G:\Games\Steam\steamapps\common\Command and Conquer Red Alert 3\
Started game with: "RA3.exe "
Caught CREATE_PROCESS_DEBUG_EVENT from Red Alert 3. Detaching...
Found game.dat process. PID 60456
*** Starting CA public key patching routine ***
CA public key is expected value.
Successfully patched CA public key.
*** Starting hostname hooking routine ***
Injecting DLL into game.dat process...
Result of injection: Code -1073741582






Using server nntest.cnc-online.net:30000
Bound to local port 61256
Bound to local alternate port 61257
Resolving hostname 'nntest.cnc-online.net'...
Resolved server host to be ''
Sending client INIT from port 61256 to nntest.cnc-online.net:30000
Received server INIT [332285]
Our public address is
Sending client INIT2 [332285] from port 61257 to nntest.cnc-online.net:30000
Received server INIT2 [332285]
Our alternate public address is
Sending cient START [332285] from port 61257 to nntest.cnc-online.net:30000
Received server START [332285]
Server extra port is 40000
Sending client PING [332285] from port 61256 to nntest.cnc-online.net:40000
Received server PING(2) [332285]
Received server PING(3) [332285]
Received server PING(4) [332285]

Received 3 pings from nntest.cnc-online.net:40000.
NAT negotiation works with your router and connection.
==> You do not have to use port forwarding.
Press any key to continue . . .


Edited by KirovAirshipReporting, 17 January 2024 - 01:36 PM.

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