GSX Pro on Microsoft Flight Simulator crashing repeatedly when I try to use it

[edu2703]

I play Microsoft Flight Simulator and Microsoft Flight Simulator 2024. For both games, I use an addon called GSX Pro, which gives me pushback functionality for aircraft and other things.

This addon connects to the simulator through an external scripting engine program called 'couatl64' with different versions for each simulator, but which have the same principle. This program is having problems on my PC.

Recently, the developer released an update to this program, and after that, I started having problems with it. Basically, when I try to use it within the game, the program crashes and restarts automatically, only to crash again and so on, continuing this cycle of crashes and restarts indefinitely. It's important to note that the crashes are limited to the addon only and do not affect the game itself, which continues to work normally.

The program log gives no clues as to what is causing this. So I checked the Windows Event Viewer and it shows that the faulty module that is possibly causing these crashes is igd12um64xeh.dll

Faulting application name: couatl64_MSFS2024.exe, version: 5.0.0.5577, timestamp: 0x678522aa
Faulting module name: igd12um64xeh.dll, version: 32.0.101.6557, timestamp: 0x679934e9
Exception code: 0xc0000409
Fault offset: 0x0000000000ed6058
Faulting process ID: 0x22C0
Faulting application start time: 0x1DB799A11F33305
Faulting application path: C:\Program Files (x86)\Addon Manager\couatl64\couatl64_MSFS2024.exe
Faulting module path: C:\WINDOWS\System32\DriverStore\FileRepository\iigd_dch_d.inf_amd64_2133089e1a0733e8\igd12um64xeh.dll
Report ID: 09d14079-1250-4e93-9559-b2f6d3dc0a12
Faulting package full name:
Faulting package relative application ID:

I did some research and found that this dll is possibly related to the Intel Graphics Driver. I brought my findings to the addon developer and he has no idea what is causing this. It just raises my same suspicion that some modification of the program made it somehow incompatible with Intel Arc cards.

I know it will be very difficult to investigate a problem with a third-party add-on for a game rather than the game itself, but I am willing to help you with whatever is necessary.

My card is an Intel Arc A770 16GB and I'm using the latest drivers.

[JeanetteC_Intel]

Hello edu2703,

Thank you for posting in Intel Communities.

I'll check on this internall and I will post an update once it's available.

Best regards,

JeanetteC.

Intel® Customer Support Technician

[Kuroedov]

Any update on this?

OS: Windows 11

CPU: AMD Ryzen 7 5700X

Faulting application name: couatl64_MSFS2024.exe, version: 5.0.0.5984, time stamp: 0x687a8d8d Faulting module name: igd12um64xeh.dll, version: 32.0.101.6972, time stamp: 0x687ab8fc Exception code: 0xc0000409 Fault offset: 0x0000000000f27578 Faulting process id: 0x19C8 Faulting application start time: 0x1DBFF41045391CA Faulting application path: C:\Program Files (x86)\Addon Manager\couatl64\couatl64_MSFS2024.exe Faulting module path: C:\WINDOWS\System32\DriverStore\FileRepository\iigd_dch_d.inf_amd64_204ba96c6f0b3e1c\igd12um64xeh.dll Report Id: 447bed3f-f0fd-478e-9b99-a941c4a96842 Faulting package full name: Faulting package-relative application ID:

[JeanetteC_Intel]

Hello edu2703,

Good day.

Since the issue occurs only when using GSX Pro and since this is a mod (we have a different forum for mod-related issues), therefore I will be routing this thread to our Developing Games on Intel Graphics forum.

For future reference on issues like this, you may post directly to the following forums:

• Developing Games on Intel Graphics
• IGCIT GitHub Support

Best regards,

JeanetteC.

Intel® Customer Support Technician

[virtualisoftware]

Hello, JeanetteC.

I'm one of the developers of the GSX Pro program, please provide me a way to contact somebody at Intel who might be able to help. I'll give your some details about our application:

• It's not a graphic application, it doesn't call into any graphic APIs like Direct/OpenGl, etc.
• It's standard win64 C++ unmanaged app, no .NET
• It's a custom Stackless Python interpreter that interfaces with MSFS 2020 or 2024 only through the standard Simconnect API which is part of the MSFS SDK, no undocumented calls, no direct access to any related to the screen.
• In some parts of the program, we use standard wxPython 4.2 library for the UI, that's the only thing "graphic" we do.
• Some users reported the version before November worked with Intel ARC. Checking our changes, the only change was to rebuild the program using the then current MSFS 2024 SDK, which comes as a C++ Static Library. According to users reports, this is where the 2024 version stopped working, but the MSFS 2020 version was still working, because we didn't updated it back then.
• We released an update in January for both versions, with the only change that can be possibly related to graphic, was to always subscribing to the "VISUAL FRAME" Simconnect event, instead of a mix of both "VISUAL FRAME" and "SIM FRAME" events, because sometimes the "SIM FRAME" event stops working. Both are callbacks in the MSFS Simconnect API, which our app just subscribes to, we don't have any control over what happens inside the sim but, it suggests the problem might be related to the screen refresh event. However, we used it a lot before, the only change we now use it in all places where we previously used "SIM FRAME" instead.
• We tried to replicate the problem with two different PC with both Intel integrated graphics and a discrete graphic as well, by forcing the PC to always use the Intel graphic adapter. MSFS 2020 and 2024 both worked, very slow, and both issued a warning the PC didn't meet the minimum requirements. However, no crashes has been observed, suggesting the problem doesn't happen with the default Intel drivers supplied with Windows, so it might be a problem that only happens when installing dedicated Intel drivers.
• Some users with Hybrid graphic as well, who ended up in a situation where the OS for some reason decided to assign the Intel integrated graphic to our application, reported that setting the name of our .exe in the nVidia app, fixed their issue.
• In the latest version we released today, we added the following exports, to help nVidia or AMD drivers to use the right card:

extern "C" {
// http://developer.download.nvidia.com/devzone/devcenter/gamegraphics/files/OptimusRenderingPolicies.pdf
__declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
​
// https://gpuopen.com/learn/amdpowerxpressrequesthighperformance/
__declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;

However, this would only help users with a discrete nVidia or AMD card, not those with an Intel ARC as their main card. The crash, as indicated above, happens in this .dll

igd12um64xeh.dll

Please let me know if you need more information.

[xaseallo]

I am also having this issue with my A770. GSX moderators claim this isn’t a GSX issue. I’m on the latest GSX version and latest driver version for the A770. I’ve tried downgrading drivers and reinstalling GSX. Is there an update for this? Anyone find a work around?

[edu2703]

I'm in conversation with the GSX developer who is completely puzzled by my issue. He was kind enough to provide the old versions of couatl.exe that work without any problems and you can use them instead of the new version even with GSX updated to the latest version. Go to the Addon Manager\couatl64 folder and replace the ones in the folder with the ones in the file you downloaded.

https://modsfire.com/eZRJvG3h4zgHiQ0

Note that this is a workaround and not a solution to the problem. There may be a version of GSX in the future that no longer works with this old version of couatl, but at least it gives us time while this issue is investigated.

If you have a discord account, join the GSX channel. There, we are talking directly to the developer about this issue. There is another person with an Arc A750 reporting the exact same thing.

GSX Discord invite

Thread about the issue

[xaseallo]

Downloaded the old versions of the Couatl and everything appears to be working just fine, even saved a backup on my desktop incase the newer GSX updates replace those applications.

Thanks again a bunch, hopefully they can figure it out and issue an update. Also joined the discord thanks for the link.

[BDub61]

I have the same GSX Pro issue with my Intel Sparkle Arc B580 graphics card with both the FS2020 and FS2024 installations. The old Couatl files fixed my issue as well.  The Intel drivers were updated on 3-9-2025. (Processor i9-13900K 3.00 GHz, 64 GB DDR5 Ram)

I also run FS2020 and FS 2024 on my MSI desktop (i-7 10700KF with an MSI Nvidia RTX 3060 graphics card). I don't see any issues with the latest GSX updates on that computer. 

Thanks edu2703!

[BDub61]

I tried to update to the latest GSX version and use the old Couatl files.  GSX stopped working

[skudieee]

Hi, sorry for bumping up this old thread. I'd love to hear updates regarding this issue. Has this been solved yet? Too bad I couldn't use GSX. Really throws me out of the immersion. Thanks!

[xaseallo]

update for this?

[xaseallo]