CTD after 3.7.4 update related to AI (MSFS2020)

[capt_pero]

Hi,

I don't know how you are manually starting GSX but if it is by executing "C:\Program Files (x86)\Addon Manager\couatl64\Couatl64_MSFS.exe" directly it will cause a CTD with AI traffic injection.
If that is the case then execute "C:\Program Files (x86)\Addon Manager\couatl64\Couatl64_boot.exe" instead.

Hope that helps.

I started this .exe as well. It may have been a coincidence that the Sim didn't crash after I started the .exe file.

[DownedAviator]

Hi,

I don't know how you are manually starting GSX but if it is by executing "C:\Program Files (x86)\Addon Manager\couatl64\Couatl64_MSFS.exe" directly it will cause a CTD with AI traffic injection.
If that is the case then execute "C:\Program Files (x86)\Addon Manager\couatl64\Couatl64_boot.exe" instead.

Hope that helps.

I started this .exe as well. It may have been a coincidence that the Sim didn't crash after I started the .exe file.

I found Couatl64_boot.exe more reliable and that is how GSX is normally started by the exe.xml file. It probably does something necessary.

[virtuali]

Are you using a 3rd party AI traffic injector ?

[renkouchuan]

After another whole morning test I can say no good news. It doesn't matter which exe you shut off and restart, CTD. Temporarily turn off all those exes and restart after AI injected, it just gives you a few more seconds before you see CTD. I'm tired of this time wasting and useless test and uninstall GSX already. 100% sure it's AI related after 3.7.4 and seems whenever GSX detects the AI it just crashes the whole thing. Now we can only wait it's fixed and fly without pushback (defualt pushback sucks!) LOL.

[virtuali]

As I already asked in other threads, can you confirm this happens ONLY if you use a 3rd party AI Injector (no matter *when* its started) ?

We only tested GSX with default AI traffic generation and I cannot replicate any crashes so, if this is confirmed to be happening only with an AI Injector, it's the only first step towards a possible fix on our side, assuming a fix IS possible.

[renkouchuan]

As I already asked in other threads, can you confirm this happens ONLY if you use a 3rd party AI Injector (no matter *when* its started) ?

We only tested GSX with default AI traffic generation and I cannot replicate any crashes so, if this is confirmed to be happening only with an AI Injector, it's the only first step towards a possible fix on our side, assuming a fix IS possible.

Yes this happens only when using 3rd party AI injector. Switch off no matter GSX or AI injectors can stop this CTD. Furthermore, if just using 3rd party models but no injectors, msfs2020 will still defaultly inject those models and causes CTD. With sim's own models, no issues.

[virtuali]

Switch off no matter GSX or AI injectors can stop this CTD.

Do you mean you have tried multiple injectors ? Does it happen with any of them, or just a specific one ?

[DownedAviator]

Switch off no matter GSX or AI injectors can stop this CTD.

Do you mean you have tried multiple injectors ? Does it happen with any of them, or just a specific one ?

Please read the previous comments. It has been reported for FSLTL and AIGTC.

[Mark823]

Using FSHud together with GSX also results in CTDs.

[pkfssim]

Same here. I updated to 3.7.4 on May 1, 2026. After that, the crashes started as soon as I enable FS HUD or BATC, which inject AI traffic. If I exit Couatl, the crashes stop. Could we revert to 3.7.3? Unfortunately, I didn’t check the forums before updating. If I had, I wouldn’t have updated to 3.7.4, like some other people did.

[pkfssim]

Same here. I updated to 3.7.4 on May 1, 2026. After that, the crashes started as soon as I enable FS HUD or BATC, which inject AI traffic. If I exit Couatl, the crashes stop. Could we revert to 3.7.3? Unfortunately, I didn’t check the forums before updating. If I had, I wouldn’t have updated to 3.7.4, like some other people did.

I'm using MSFS2020 with BATC or FSHUD, with AI Injection. I also use FSTL and AIG models.

[virtuali]

After that, the crashes started as soon as I enable FS HUD or BATC, which inject AI traffic.

So it's clear the crashes are caused by the injection, I have BATC but I never used the injection, so I guess I can test this easily.

[renkouchuan]

Alright, let me just try to be more clear so it's easier to find out which part is broken. Basically FSLTL and AIG both have two parts work together to inject AI to sims, which are base model pack and the injector. Everyone knows this for sure. What someone might don't know is, different model pack can also be used by different injectors, which means FSLTL can inject AIG models or reverse as well. Technically even you don't have any injectors but only models installed, the sim will also inject them just like inject those default msfs made models. So base on above, we can get the following combinations:

1. AIG models with AIG TC - 100% CTD
2. AIG models with FSLTL injector - 100% CTD
3. AIG models with no injector but msfs injects - 100% CTD
4. FSLTL models with FSLTL injector - less CTD but not 0
5. FSLTL models with AIG TC - didn't test but should be the same as #4
6. FSLTL models with no injector - didn't test
7. Default models injection(No AI addon) - No CTD

[virtuali]

Please read the previous comments. It has been reported for FSLTL and AIGTC.

And it's precisely because I read the previous comment that I have asked, because from that sentence alone, is not possible to understand if:

- if it happens with a specific injector only

- if it happens with JUST those TWO

- if it happens with ANY AI injector

- if doesn't happen with ONE (or more) AI injector

All possible valid outcomes that couldn't be surely verified by the simple "It has been reported for FSLTL and AIGTC" sentence which, as such, only indicates it happens with those two.

[virtuali]

So base on above, we can get the following combinations

You listed 7 combinations, with only one (default AI models with no injection causing zero CTD, assuming this is WITH GSX enabled...). Have you tried ALL of those 7 with AND without GSX ?

Also, it doesn't seem you ever tried a combination with some AI Injector but using default MSFS models. I'm trying to understand if the problem if the injection process itself, or the models, or both.