COMMON AION ERROR CODES AND SOLUTIONS

[Mantios]

AION CLIENT ERROR CODES – COMMUNITY TROUBLESHOOTING REFERENCE

IMPORTANT NOTICE
This document is NOT an official NCSoft or Gameforge publication.
NCSoft never released an official list of Aion client error codes.

This file is reconstructed from:
- Official Aion EU forum troubleshooting posts (2009–2015, now removed)
- Community reports (RageZone, ElitePvPers)
- Reverse engineering of the Aion client (CryEngine 2)
- Empirical testing over many years

--------------------------------------------------

COMMON AION ERROR CODES AND SOLUTIONS

Aion[1001] – Game protection initialization failed
Solutions:
- Run as Administrator
- Disable antivirus / firewall
- Add Aion folder to exclusions
- Close debuggers (IDA, x64dbg, Cheat Engine)

Aion[1002] – Failed to connect to authentication service
Solutions:
- Check login server IP and port
- Ensure login server is running
- Disable VPN / proxy
- Open firewall ports

Aion[1003] – Invalid client version
Solutions:
- Match client and server version
- Fix S_VERSION_CHECK
- Verify correct region (EU / NA / Classic)

Aion[1005] – Game files corrupted
Solutions:
- Re-extract client
- Verify .pak files
- Check folder structure

Aion[1011] – Display / resolution initialization failure
Solutions:
- Set 1024x768 in system.cfg
- Disable fullscreen
- Delete system.cfg to regenerate

Aion[1014] – DirectX initialization failed
Solutions:
- Install DirectX 9.0c (June 2010)
- Reboot
- Update GPU drivers

Aion[1017] – Insufficient permissions
Solutions:
- Run as Administrator
- Move client out of Program Files
- Disable UAC temporarily

Aion[1020] – Memory allocation failure
Solutions:
- Increase RAM
- Close background apps
- Apply Large Address Aware patch

Aion[1021] – Anti-debug / VM detection triggered
Solutions:
- Close reversing tools
- Avoid VM
- Use GPU passthrough

Aion[1023] – Failed to load engine modules
Solutions:
- Install Visual C++ Redistributables (2005–2010)
- Restore missing DLLs

Aion[1024] – Failed to initialize the game
(CryEngine catch-all error)

Solutions:
- Install DirectX 9.0c
- Update GPU drivers
- Delete system.cfg
- Disable fullscreen
- Install VC++ runtimes
- Limit CPU cores on modern CPUs

Aion[1030] – Network subsystem initialization failed
Solutions:
- Reset Winsock
- Disable VPN / proxy
- Check firewall rules

Aion[1040] – Locale / region mismatch
Solutions:
- Fix region.ini
- Ensure client language matches server
- Fix S_SERVER_ENV
- Do not mix EU and NA clients

MODERN CPU COMPATIBILITY ISSUES

Older Aion clients were not designed for modern CPUs.

Affected CPUs:
- AMD Ryzen 9 (5900X, 7950X)
- Threadripper
- Intel 12th–14th gen

Symptoms:
- Game does not start
- Instant close
- Aion[1024] or no error

Cause:
CryEngine thread initialization fails on modern CPU topology.

SOLUTIONS:

1) Force CPU affinity (MOST RELIABLE)
Limit Aion to 1–4 cores.

Example:
start /affinity 3 bin32\aion.bin

Affinity masks:
1 = core 0
3 = cores 0–1
7 = cores 0–2
F = cores 0–3

2) Disable SMT / Hyper-Threading in BIOS

3) Launcher legacy / infinity / compatibility flags

4) Windows 7 compatibility mode
- Disable fullscreen optimizations
- Run as Administrator

--------------------------------------------------

HISTORICAL NOTE

Most of this information originally existed on the official
Aion EU forums as troubleshooting stickies and GM replies.

Those forums were migrated or deleted.
This file preserves that lost knowledge.​

 

[Beyond Aion]

I suggest revising this list to stop perpetuating the myth that running as Administrator is generally advisable.

It is never a fix and becomes a huge problem when regular users start running everything as admin as a precaution. In the very few cases that I've come across where running as Admin helped, it was a workaround for problems caused by missing file permissions. And it often comes with all kinds of negative side effects, like files getting read or written in the wrong places, either because the user failed to specify the correct working directory or because the program is behaving differently when run from an elevated account.

So in the context of Aion, better advise fixing read/write permissions on the game folder. The game can write quite a few files into its directory (configs, logs, emblems, screenshots, map paintings, cache files, ...) and doesn't play nicely with the VirtualStore, so it needs recursive write permissions to run properly.

 

[ragnarokatx]

AION CLIENT ERROR CODES – COMMUNITY TROUBLESHOOTING REFERENCE

IMPORTANT NOTICE
This document is NOT an official NCSoft or Gameforge publication.
NCSoft never released an official list of Aion client error codes.

This file is reconstructed from:
- Official Aion EU forum troubleshooting posts (2009–2015, now removed)
- Community reports (RageZone, ElitePvPers)
- Reverse engineering of the Aion client (CryEngine 2)
- Empirical testing over many years

--------------------------------------------------

COMMON AION ERROR CODES AND SOLUTIONS

Aion[1001] – Game protection initialization failed
Solutions:
- Run as Administrator
- Disable antivirus / firewall
- Add Aion folder to exclusions
- Close debuggers (IDA, x64dbg, Cheat Engine)

Aion[1002] – Failed to connect to authentication service
Solutions:
- Check login server IP and port
- Ensure login server is running
- Disable VPN / proxy
- Open firewall ports

Aion[1003] – Invalid client version
Solutions:
- Match client and server version
- Fix S_VERSION_CHECK
- Verify correct region (EU / NA / Classic)

Aion[1005] – Game files corrupted
Solutions:
- Re-extract client
- Verify .pak files
- Check folder structure

Aion[1011] – Display / resolution initialization failure
Solutions:
- Set 1024x768 in system.cfg
- Disable fullscreen
- Delete system.cfg to regenerate

Aion[1014] – DirectX initialization failed
Solutions:
- Install DirectX 9.0c (June 2010)
- Reboot
- Update GPU drivers

Aion[1017] – Insufficient permissions
Solutions:
- Run as Administrator
- Move client out of Program Files
- Disable UAC temporarily

Aion[1020] – Memory allocation failure
Solutions:
- Increase RAM
- Close background apps
- Apply Large Address Aware patch

Aion[1021] – Anti-debug / VM detection triggered
Solutions:
- Close reversing tools
- Avoid VM
- Use GPU passthrough

Aion[1023] – Failed to load engine modules
Solutions:
- Install Visual C++ Redistributables (2005–2010)
- Restore missing DLLs

Aion[1024] – Failed to initialize the game
(CryEngine catch-all error)

Solutions:
- Install DirectX 9.0c
- Update GPU drivers
- Delete system.cfg
- Disable fullscreen
- Install VC++ runtimes
- Limit CPU cores on modern CPUs

Aion[1030] – Network subsystem initialization failed
Solutions:
- Reset Winsock
- Disable VPN / proxy
- Check firewall rules

Aion[1040] – Locale / region mismatch
Solutions:
- Fix region.ini
- Ensure client language matches server
- Fix S_SERVER_ENV
- Do not mix EU and NA clients

MODERN CPU COMPATIBILITY ISSUES

Older Aion clients were not designed for modern CPUs.

Affected CPUs:
- AMD Ryzen 9 (5900X, 7950X)
- Threadripper
- Intel 12th–14th gen

Symptoms:
- Game does not start
- Instant close
- Aion[1024] or no error

Cause:
CryEngine thread initialization fails on modern CPU topology.

SOLUTIONS:

1) Force CPU affinity (MOST RELIABLE)
Limit Aion to 1–4 cores.

Example:
start /affinity 3 bin32\aion.bin

Affinity masks:
1 = core 0
3 = cores 0–1
7 = cores 0–2
F = cores 0–3

2) Disable SMT / Hyper-Threading in BIOS

3) Launcher legacy / infinity / compatibility flags

4) Windows 7 compatibility mode
- Disable fullscreen optimizations
- Run as Administrator

--------------------------------------------------

HISTORICAL NOTE

Most of this information originally existed on the official
Aion EU forums as troubleshooting stickies and GM replies.

Those forums were migrated or deleted.
This file preserves that lost knowledge.​

no luck so far unfortunately for Aion client 3.5 provided in the Robyson thread.

yea it is highly possible it's the CPU that's not compatible, since I have AMD Ryzen 5 5500.

Did the following so far:
- Install DirectX 9.0c (directx 9 June 2010)
- Update GPU drivers (Geforce GTX 1650)
- Delete system.cfg
- Install VC++ runtimes (2005, 2008, 2010)
- Tried forcing CPU affinity to 3 and 1
- Disabled SMT in BIOS (AMD processor, hyper-threading is Intel trademark technology)

now the part that I'm not so sure about is how to run the game in windowed mode. i tried options -windowmode, -windowed, -window in aion_start_local.bat, but no luck, game still starts full screen. also what options do i put in for launcher legacy, infinity and compatibility flags?

also I'm not sure how to run it in windows 7 compatibility mode. is it a flag that I put in aion_start_local.bat? because when I right click on properties for aion.bin, since it's not an .exe file, windows doesn't allow me to set compatibility options.

P.S. I'm testing out the Aion 4.3 Red katalam client, and it's not launching with the same error on my windows 10 desktop. I'm going to transfer it over to my windows 11 desktop, my guess is that it will launch properly on the windows 11 desktop.

====================================

UPDATE:

I don't believe it. after changing country code to 2, language to use eng and changing the name of folders under L10N to ENG, game client successfully launchers but everything is in korean so I can't read a single thing, looool

 

[Mantios]

no luck so far unfortunately for Aion client 3.5 provided in the Robyson thread.

yea it is highly possible it's the CPU that's not compatible, since I have AMD Ryzen 5 5500.

Did the following so far:
- Install DirectX 9.0c (directx 9 June 2010)
- Update GPU drivers (Geforce GTX 1650)
- Delete system.cfg
- Install VC++ runtimes (2005, 2008, 2010)
- Tried forcing CPU affinity to 3 and 1
- Disabled SMT in BIOS (AMD processor, hyper-threading is Intel trademark technology)

now the part that I'm not so sure about is how to run the game in windowed mode. i tried options -windowmode, -windowed, -window in aion_start_local.bat, but no luck, game still starts full screen. also what options do i put in for launcher legacy, infinity and compatibility flags?

also I'm not sure how to run it in windows 7 compatibility mode. is it a flag that I put in aion_start_local.bat? because when I right click on properties for aion.bin, since it's not an .exe file, windows doesn't allow me to set compatibility options.

P.S. I'm testing out the Aion 4.3 Red katalam client, and it's not launching with the same error on my windows 10 desktop. I'm going to transfer it over to my windows 11 desktop, my guess is that it will launch properly on the windows 11 desktop.

View attachment 293535
View attachment 293534

View attachment 293533
View attachment 293536








====================================

UPDATE:

I don't believe it. after changing country code to 2, language to use eng and changing the name of folders under L10N to ENG, game client successfully launchers but everything is in korean so I can't read a single thing, looool

View attachment 293537
View attachment 293538

Here you habe above example how should look like your beginning of command in louncher:
"start /affinity 3 bin32\AION.bin"
Exacly same way. After another commands as lang cc etc.

To reset all client setting ingame as windiws resolution etc. Just simply delete cfg file.. Or if you can't change it to window mode just copie cfg file from another client where your Aion was working. Or just simply open with cfg editor and change inside.

PS if you change cc=2 you need to change l10n Lang into eng. That is europe. ENU it's "us" country code. It's not that easy like look like. Aion client it's difficult somtimes.
If you wanna see what client loading into memory first install proces monitor. And add aion.bin. To it. You will see what Wil ask for files first and where it's stopping.

 

[Beyond Aion]

PS if you change cc=2 you need to change l10n Lang into enu. That is europe. ENG it's "us" country code.

It's the other way around, cc=1 is NA / ENU, cc=2 is EU / ENG.

 

[FliesQQ]

can't run AION 3.X x64 when using /affinity X.
My Cpu is i9-13950hx

 

[Mantios]

can't run AION 3.X x64 when using /affinity X.
My Cpu is i9-13950hx

This problem it's diffrent pair of shoes.
Was mentioned here.
Fix for 64-bit aion client on win11 24h2 (and 4.0- for win10) https://forum.ragezone.com/threads/...ient-on-win11-24h2-and-4-0-for-win10.1243794/

I use 23H2 and this is not work for 3.X, even I delete aegisty.bin.
x86 work correct, x64 not.

For me working. You have another bin64 to test with? For example from aion epic?

Are you sure you add fix command in launcher exacly for win10?

Or your win version 23h2

Do you test it on diffrent pc?
marisa-chan
Can you confirm that?

 

[FliesQQ]

This problem it's diffrent pair of shoes.
Was mentioned here.
Fix for 64-bit aion client on win11 24h2 (and 4.0- for win10) https://forum.ragezone.com/threads/...ient-on-win11-24h2-and-4-0-for-win10.1243794/

I use 23H2 and this is not work for 3.X, even I delete aegisty.bin.
x86 work correct, x64 not.

 

[marisa-chan]

I use 23H2 and this is not work for 3.X, even I delete aegisty.bin.
x86 work correct, x64 not.

If you provide at least bin64 dir I will try to catch error.

 

[Deleted member 2000434628]

Interesting these errors in Windows 10, i personally never had these problems.
Looking at Robyson's thread, these problems were never reported, only mouse problems. lol.
However, Aion 3.5 and 4.3 never worked on 64-bit systems.

 

[FliesQQ]

If you provide at least bin64 dir I will try to catch error.

this is bin64 folder

To view the content, you need to sign in or register

this is the 3.5 client

To view the content, you need to sign in or register

 

[marisa-chan]

this is bin64 folder

To view the content, you need to sign in or register

this is the 3.5 client

To view the content, you need to sign in or register

And it's worked for me with bat:

start /affinity 7FFFFFFF "" bin64\aion.bin -cc:1 -lang:enu -noweb -noauthgg -ncg -ng -ingameshop -ingamebrowser -hidepromo -nokicks -ls -nowebshop -win10-mouse-fix -unlimited-gfx -fix-39-weapon-switch -fix-stack-win11 -ip:xxx -port:xxx

But I test it on win11 25h2 and 24h2. 64 cores in system, so it's only work with affinity

 

[FliesQQ]

And it's worked for me with bat:

But I test it on win11 25h2 and 24h2. 64 cores in system, so it's only work with affinity

-fix-stack-win11 I didn't use this, it works when use this.

#if defined(_M_AMD64)
    if (strstr(GetCommandLineA(), "-fix-stack-win11") != NULL) {
        /* fix stack on call CloseHandle */
        DetourAttach(&(PVOID&)real_CloseHandle, zzCloseHandle);

        /* fix for rbp restore in themida */
        HMODULE hntdll = GetModuleHandleA("ntdll.dll");
        real_RtlAddVectoredExceptionHandler = (TRtlAddVectoredExceptionHandler)GetProcAddress(hntdll, "RtlAddVectoredExceptionHandler");

        DetourAttach(&(PVOID&)real_RtlAddVectoredExceptionHandler, zzRtlAddVectoredExceptionHandler);

        /* fix stack on call. Use custom getprocaddress because standard return it from aclayer */
        HMODULE hkernel32 = GetModuleHandleA("kernel32.dll");
        real_CreateFileA = (decltype(CreateFileA)*)CustomGetProcProcess(hkernel32, "CreateFileA");

        DetourAttach(&(PVOID&)real_CreateFileA, zzCreateFileA);

        /* same fix*/
        DetourAttach(&(PVOID&)real_LoadLibraryA, zzLoadLibraryA);
    }
#endif

    //Affinity fix
    SYSTEM_INFO info;
    GetSystemInfo(&info);
    if (info.dwNumberOfProcessors >= 32) {
        int maxcpu = info.dwNumberOfProcessors;
        if (maxcpu > 64)
            maxcpu = 64;
        uint64_t mask = ((uint64_t)1 << (maxcpu - 1)) - 1;
        SetProcessAffinityMask(GetCurrentProcess(), (DWORD_PTR) & mask);
    }

    LONG error = DetourTransactionCommit();
}

 

[marisa-chan]

-fix-stack-win11 I didn't use this, it works when use this.

#if defined(_M_AMD64)
    if (strstr(GetCommandLineA(), "-fix-stack-win11") != NULL) {
        /* fix stack on call CloseHandle */
        DetourAttach(&(PVOID&)real_CloseHandle, zzCloseHandle);

        /* fix for rbp restore in themida */
        HMODULE hntdll = GetModuleHandleA("ntdll.dll");
        real_RtlAddVectoredExceptionHandler = (TRtlAddVectoredExceptionHandler)GetProcAddress(hntdll, "RtlAddVectoredExceptionHandler");

        DetourAttach(&(PVOID&)real_RtlAddVectoredExceptionHandler, zzRtlAddVectoredExceptionHandler);

        /* fix stack on call. Use custom getprocaddress because standard return it from aclayer */
        HMODULE hkernel32 = GetModuleHandleA("kernel32.dll");
        real_CreateFileA = (decltype(CreateFileA)*)CustomGetProcProcess(hkernel32, "CreateFileA");

        DetourAttach(&(PVOID&)real_CreateFileA, zzCreateFileA);

        /* same fix*/
        DetourAttach(&(PVOID&)real_LoadLibraryA, zzLoadLibraryA);
    }
#endif

    //Affinity fix
    SYSTEM_INFO info;
    GetSystemInfo(&info);
    if (info.dwNumberOfProcessors >= 32) {
        int maxcpu = info.dwNumberOfProcessors;
        if (maxcpu > 64)
            maxcpu = 64;
        uint64_t mask = ((uint64_t)1 << (maxcpu - 1)) - 1;
        SetProcessAffinityMask(GetCurrentProcess(), (DWORD_PTR) & mask);
    }

    LONG error = DetourTransactionCommit();
}

Why you do not use "-fix-stack-win11"? It's fix main problems.

And yes, I forget about integration affinity fix into dll, recheck it with exactly last version.dll and it works without any affinity flag, but WITH only "-fix-stack-win11", because it will not work without of it. You could recompile version.dll and enable it without command line argument.

 

[Novichok]

There's a mouse issue with client version 5.8. I installed version.dll and ran it using this code, but the issue persists.
Can anyone help?

By the way, I'm running the client in windowed mode.
My operating system is Windows 11.

In windowed mode, the problem is with the mouse, but in full-screen mode, the problem disappears.

start bin64\aion.bin -ip:ххх -port:ххх -cc:1 -event:1 -f2p -webshopevent:2 -megaphone -iovation -fools -ingamebrowser -ingamewebshop -webpetition  -disable-xigncode -fix-stack-win11 -win10-mouse-fix -win10-mouse-fix-autodetect -windowed-mouse-fix[/CODE

 

[spearzet]

There's a mouse issue with client version 5.8. I installed version.dll and ran it using this code, but the issue persists.
Can anyone help?

By the way, I'm running the client in windowed mode.
My operating system is Windows 11.

In windowed mode, the problem is with the mouse, but in full-screen mode, the problem disappears.

start bin64\aion.bin -ip:ххх -port:ххх -cc:1 -event:1 -f2p -webshopevent:2 -megaphone -iovation -fools -ingamebrowser -ingamewebshop -webpetition  -disable-xigncode -fix-stack-win11 -win10-mouse-fix -win10-mouse-fix-autodetect -windowed-mouse-fix[/CODE

did you fix the problem bro? because i have same problem.

edit: found a client that fixes the issue.