FSDreamTeam forum
Products Support => KIAH - Houston Intercontinental Airport for MSFS => Topic started by: TheDavid737 on July 29, 2025, 02:53:07 am
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Something about this specific addon airport with the iFly Max 8 and as of today the Fenix airplanes. I have tested multiple airports, aircraft, and liveries. Aerosoft CRJ and PMDG at FSDT IAH load ok. When I disable FSDT IAH and use default, the Max8 loads ok.
Most of the time, when I click Start Flight, the flight never loads, even after hours of waiting. When it does load in, CTD shortly after.
Able to reproduce using the Max 8 UAL livery by Javiation through ifly manager, at Gate C5, and Fenix A319 CFM United Livery through livery manager at Gate C12. On one occasion I had to reboot PC to get sim to load after a CTD.
I can't speak to PMDG but it seems using a native 2024 aircraft, I can reproduce these results same occurs.
Another friend is reporting same symptoms.
I am happy to provide any logging or screenshots necessary to assist. Just wanted to see if anyone else is running into this?
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Hey dude!
I get the same thing! I tried to duplicate your issue right now at gate A10. I chose to use a different gate to make sure it was airport wide and not just C5. Upon hitting "Fly Now" the simulator crashed just like yours did!!! This is really weird and I love flying into IAH, so I'm glad you brought this up to FSDT's attention. I'm afraid I can't fly in there anymore because of this issue. I actually reached out to IFly and they wanted me to discuss this further with FSDT because they think it might be an issue with the scenery.
By the way, i also tested the BFU like you did, and I got another crash!
FSDT -- please investigate this! I miss being able to fly into IAH! Why is this happening?
Davis
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Hey Umberto, what's going with this scenery not working, boss? I'd love to use it in 2024 but I can't, boss.
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Tested it now, can't see any problems, this is with the latest Fenix installed, which also called automatically the jetway through its automation. VGDS works, showing GSX is working normally as well.
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I am also having the same issue with the Fenix with this scenery as of today with the latest update.
***Update***
Did a full reinstall of KIAH on the FSDT installer and that has fixed the problem for me so far.
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Umberto thx for the reply — per Prawns reply, I will reinstall IAH to see if that fixes the issue. Might there be some documentation you’d like to see to diagnose the issue, should the reinstall not work?
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Umberto -- just reinstalled IAH, still happening. Freezes right after spawning at the airport...any gate/runway/any plane like fenix/crj, I attached GSX log files that may help you figure out why.
Please let me know asap.
Davis
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I am also having the same issue with the Fenix with this scenery as of today with the latest update.
***Update***
Did a full reinstall of KIAH on the FSDT installer and that has fixed the problem for me so far.
Hi DefiantPrawn, have things still been working since your reinstall? I have tried removing all addons, reinstalling both FSDT IAH and GSX completely. I have narrowed my issue down to GSX. I even run into an issue where taking off from HOU, flying over IAH on a departure, I get a CTD as soon as I get into close proximity to IAH, even when FSDT IAH removed completely. So I am crashing even with default IAH scenery it seems now.
Tested it now, can't see any problems, this is with the latest Fenix installed, which also called automatically the jetway through its automation. VGDS works, showing GSX is working normally as well.
Virtuali, I went ahead and attached a log from one of my flights were I was not able to load into IAH. I initially thought it was the scenery but It seems when I disable GSX, I can get into both default and FSDT IAH without issue. Then as soon as I enable GSX, the sim freezes. It doesn't really crash, just locks up and becomes unresponsive. I have to kill it in task manager. If I try to load into IAH with GSX running, I can get in all the way maybe 1 in 10 times, but the other 9, I get the same locked up sim before I can get to the airplane. If it is one of the times I can get into flight all the way with GSX running, I either get a freeze or CTD after a minute or two. Also as noted above to DefiantPrawn, I can even take off from HOU, GSX running, all is good. Then as soon as I get anywhere close to IAH (default or FSDT IAH, either one) then I get a full CTD. Hopefully the attached log might help see what my sim is doing? If there is other logging or anything specific I can do to help you please let me know and I will get it to you. Thanks for your help :)
p.s. I am getting theses symptoms in the Fenix A319/32/321 after the BFU, the iFlymax 8, and the PMDG 777-300. I don't seem to get this issue with the current version of the CRJ though. I was able to land at IAH one time without issues, but as soon as I pulled up to the gate, the sim crashed.
***UPDATE*** 09/05/2025 - 9:13PM CT
I jumped into the sim in the Fenix A320 at C4 with FSDT IAH and GSX both. Loaded in just fine, no issues. All seemed well. Restarted Couatl via the GSX menu and as then CTD. Log from this most recent event is attached now as well called "09052025_Coutal.log.txt" and additionally added the couatl64_boot log as well, called "09052025_couatl64_boot.log.txt"
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As I've said, I cannot reproduce the problem, KIAH works fine here. Your log doesn't show any GSX errors, it just said MSFS crashed and correctly detected the event.
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As I've said, I cannot reproduce the problem, KIAH works fine here. Your log doesn't show any GSX errors, it just said MSFS crashed and correctly detected the event.
Is there any other logging I can provide that would be helpful? I can reproduce it every single time. I have to physically kill GSX in the taskbar anytime I fly near IAH or I get a CTD.
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As I've said, I cannot reproduce the problem, KIAH works fine here. Your log doesn't show any GSX errors, it just said MSFS crashed and correctly detected the event.
Wow, that is so odd. I wonder why, with GSX off, it doesn't crash, and when we turn GSX on, it goes back to crashing. Yet, the logs don't show its crashing. So just to clarify, in our situation, there's nothing you suggest to do in our case? Even though the crash/freeze happens only when GSX is running? Have you looked at my logs as well to see if an issue is found in there?
Thx
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Umberto — can I schedule a time to screen share the issue with you? At this point it’s been weeks with no fix here man. I’m in the eastern U.S. Open to options.
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i got the same issue. with ifly i cant go into kiah. Once it did but after couple seconds the sim freezes. i am on 2024
edit when i first start at the runway it does work.
Oke i think it has something to do with loading gsx when starting to board
oke it is maybe conflicting gsx profiles. i had kiah and kiahv1 profile? I deleted them both and used flightsim to profile. seems to load now.
edit again so i tried loading into gate e3 but the sim freezes. not sure what it is.
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I got the same issue with Fenix, Ifly and Maddog. I cant go into KIAH (Imaginesim) airport. No problem at the gate, but when starting taxi, takeoff or approaching in flight it freezes. (MSFS2024 SU4).
When I turn off the couatl and I don't use GSX, I don't have any problems with the airport and aircrafts. So I understand the problem has to do with something from GSX. I Hope for quickly solution.
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As I've said, I cannot reproduce the problem, KIAH works fine here. Your log doesn't show any GSX errors, it just said MSFS crashed and correctly detected the event.
Hi sir. Since it appears the number if impacted users is increasing, is there anything any of us can provide to help further assist your troubleshooting this issue? Understanding you cannot reproduce this issue yourself, however, we are now up to five reported cases it seems.
I did find a similar support post on the GSX Discord, wondering if this is somehow related. The timing here does seem to be in line when I started running into this issue. Link to the support post for your convenience: https://discord.com/channels/1011680327346966590/1369625542743031829
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Just to add, I'm gettting the same issue with a freeze of MSFS24 if i try to spawn in at KIAH in the Fenix A320 but if I remove the "kiah-fstd.ini" profile then I can spawn in and move around freely
I have a created a new empty profile and I can still get into KIAH without problem so I think as was previously mentioned it may be something to do with the GSX profile.
I'm currently trying a profile from Flightsim.to (GSX KIAH V2.1) and so far I can spawn in and taxi out without issue. I've tried both C3 and E3 where I had issuses and it's working fine for me so far.
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I did manage to get it working. i restarted coatl when i nthe msfs menu. and then started the flight. It did load. Not sure when i freezes
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Just to add, I'm gettting the same issue with a freeze of MSFS24 if i try to spawn in at KIAH in the Fenix A320 but if I remove the "kiah-fstd.ini" profile then I can spawn in and move around freely
I have a created a new empty profile and I can still get into KIAH without problem so I think as was previously mentioned it may be something to do with the GSX profile.
I'm currently trying a profile from Flightsim.to (GSX KIAH V2.1) and so far I can spawn in and taxi out without issue. I've tried both C3 and E3 where I had issuses and it's working fine for me so far.
I did have some success removing the GSX profile and using the GSX KIAH V2.1 from flightsim.to but both efforts were short-lived. Eventually, the issue returned. I also noticed that when you run the updater for GSX with FSDreamTeam KIAH installed, it replaces their GSX profile in the folder automatically. Further testing, I removed the FSDreamTeam‘s KIAH altogether and noticed I am still having the same issue unfortunately. The only way I can run the Sim anywhere within the vicinity of KIAH is by disabling GSX by ending the process in the taskbar. Then when I leave the KIAH area, I can restart it and all is fine.
If I try to launch at IAH with GSX running, I get the freeze 90% of the time. In the above scenario if I leave GSX running while flying over KIAH I get a CTD.
I also wanted to note that in the cases where I can get in and move around without any issue, restarting GSX through the menu in simulator will cause a CTD or a freeze for me. Also about 90% of the time. I know that in most cases, there’s no need to restart GSX via the menu in the simulator, it was just something I noticed during troubleshooting.
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Yup I just had the same, I flew into and landed fine at KIAH but half way through turnaround MSFS2024 froze and then CTD. like others not getting this anywhere else so until a solution is found for KIAH is closed for business. :(
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yes its a weird problem. First i thought i fixed it with different gsx profile. But then it works for a couple times. And then crashes/freeze again.
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I’m wondering if there is a way to ping or bring this thread back up to Umberto so he know there are more users running into this issue?
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Umberto does also answer stuff on Discord so it may be worth mentioning it on there.
Edit: I've just checked on Discord and I couldn't find a post with the same issue on there so I would suggest Make sure you have logging turned on and the next time you have the issue you report it on Discord and make sure you follow the guide for reporting issues or it will get ignored.
link to support page https://discord.com/channels/1011680327346966590/1044952279029121046
Whilst it is not the official support forum the guys there and Umberto will do their best to resolve the issue or at least point you in the right direction. DO make sure you search first to make sure someone hasn't already posted.
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According to this post on the MSFS forum, it seems to be caused by BATC:
https://forums.flightsimulator.com/t/batc-freezing-sim-at-kiah-fsdt/739399
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According to this post on the MSFS forum, it seems to be caused by BATC:
https://forums.flightsimulator.com/t/batc-freezing-sim-at-kiah-fsdt/739399
I’m not running BATC. It’s never been installed on my machine. I’ve been having this issue since SU2 and it also occurs even when I have FSDT IAH uninstalled. I have spent hours and hours testing and testing and can confidently say it only occurs when GSX is running. It seems logging isn’t showing what Umberto needs either as I have provided that as well. Umberto, I am happy to screen record or send you anything you need to assist with troubleshooting. IAH is one of my favorite places to fly out of and love using GSX there but cannot.
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According to this post on the MSFS forum, it seems to be caused by BATC:
https://forums.flightsimulator.com/t/batc-freezing-sim-at-kiah-fsdt/739399
unless I'm mistaken the link you posted has only 4 posts and only 1 of them mentions BATC where they state "Not BATC either. Now Im getting full CTD at KIAH"
I too get this freeze/lock up albeit irregularly and again without BATC. Unfortunately I have tried 4 times this week and on all occasions I have managed to get in and out of KIAH without problems, so I understand how difficult it must be to find a problem that is as intermittent as this. I will persevere though and try to get some logs for you. Where is the best place to post them here or on Discord?
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According to this post on the MSFS forum, it seems to be caused by BATC:
https://forums.flightsimulator.com/t/batc-freezing-sim-at-kiah-fsdt/739399
No BATC for me. This started randomly during SU2. The link you provided states that this is a SU4 issue, but, as stated in that forum people state it happened prior. I can assure you this started prior as well. I would investigate the following update because this is when I, along with some others believe it started. I’ve reached out to “TheDavid” on here and he also had a ticket with Ifly team on 7/26 stating when the issue started, and they sent him here because it was happening with all planes not just ifly; btw he regularly flies out of IAH. He/we initially thought it was an IFLY issue but it happens with all planes to this day.
GSX update around the time TheDavid and I started having issues: https://discord.com/channels/1011680327346966590/1019639700153188392/1392089880489627718
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Umberto, that link you provided regarding BATC seems to have evolved into a “non-BATC” issue. I have asked over there if others are seeing any issues after disabling GSX the same as myself and others are. I also provided the link to this forum thread in that MSForum post in hopes to combine collaborative efforts to assist with your troubleshooting.
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Same here. Although it is on SU4 beta. I started that thread over at https://forums.flightsimulator.com/t/sim-freeze-ctd-at-kiah-gsx-issue/739399.
Updated thread to reflect a GSX issue...
Some more testing:
1. GSX installed + GSX profile from .to = FREEZE.
2. GSX installed, NO GSX profile = FREEZE.
3. GSX uninstalled = NO FREEZE.
Freeze happens usually when taxing out. Once I was all the way at rotation...
Start gate E3 in Fenix. Start taxi out for RWYs 33s or 15s. Freeze will happen at some point taxing out.
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I need to add my name to this list.
I recently tried three times to fly from KIAH in a Fenix A321.
It froze as soon as I started pushback from the gate.
I also removed/disabled KIAH but still had the same crash.
I haven't tried flying there with GSX disabled.
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Umberto -- there are several people that have joined this thread looking for a solution with this GSX issue. Can you confirm you are looking into this? I understand you didn't see the issue initially on your end, however as I'm sure you've seen now, it’s pervasive for many, as evidenced by 8000+ views and numerous replies.
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I am having the same problem with default and 3rd Aircraft.
Regards,
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Umberto - can you take another look at this thread. The number of your impacted customers is increasing. Per your last suggestion, BATC has been ruled out and GSX has been confirmed to be involved somehow. If there is anything we can provide to assist please let us know.
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unless I'm mistaken the link you posted has only 4 posts and only 1 of them mentions BATC where they state "Not BATC either. Now Im getting full CTD at KIAH"
The post has been edited or removed after I posted its link! When I posted it, somebody said it was fixed by removing BATC and, since I already verified and posted in another thread KIAH works fine:
https://forums.flightsimulator.com/t/sim-freeze-ctd-at-kiah-gsx-issue/739399
I just assumed whoever wrote that by removing BATC the crash was gone, was correct. Of course, I'll check it again with the latest SU4 Beta.
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I tested it again now, with the latest MSFS 2024 SU4 Beta, using the inibuilds default A320 V2, started a flight on Gate A10, called GSX Pushback then taxied to Rwy 15L, stayed for 5 minutes on hold, than I took off and flew for 10-15 minutes in the area.
No CTDs.
I also opened the GSX menu a couple of times after take off (before reaching 10.000 ft after which GSX disables itself), and it showed all nearby airports as expected, indicating the Navdata has been read correctly.
Reading a couple of confirmation this happens also with KIAH not installed:
Further testing, I removed the FSDreamTeam‘s KIAH altogether and noticed I am still having the same issue unfortunately.
I also removed/disabled KIAH but still had the same crash.
Seems to indicate there's no issue with the airport, it's more something related to the KIAH area in general.
Now, since previous reports SEEMED to indicate this was caused by BATC, and BATC ALSO reads the Navdata using the Navdata API just like GSX does, it's possible that BOTH GSX and BATC are affected by the same problem with the Navdata in the KIAH area so, some users removing BATC and still getting a CTD, might be easily mislead "it wasn't BATC, so it must be GSX", but maybe the CTD might have happened just the same if you disabled GSX but kept BACT installed, because the cause is neither of the two apps: it's something in the Navdata in the KIAH area that would cause the sim to crash when queried.
As explained so many times, neither GSX nor BATC can cause the sim to crash directly, because they are both running as external .EXE. However, if they use Simconnect to call the Navdata API, a problem with it (which can happen BOTH using the default Navdata but also with 3rd party Navdata) MIGHT crash the sim, if the sim is not able to deal with the Simconnect request in a graceful manner.
This already happened before: crashes in tha Navdata API has been reported in the past and were fixed by Asobo in some cases, and by Navigraph in other cases (even if the real cause was the sim crashing just because there was a duplicate item).
So, the next question is: all of you affected, are maybe using Navigraph or another 3rd party Navdata ?
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Thanks Umberto that's quite helpful. I can confirm that without BATC the problem still happens (I get a freeze rather than a CTD) but it is so irregular as to when it happens. I do have a Navigraph subscription which is kept up to date. Can you suggest anything we could try to either eliminate or point the finger in this direction? or is it just simply remove navigraph form the systme completly?
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Forget BATC! I wrote that thead, and it has been updated long time ago.
Fact is: GSX istalled = freeze at KIAH.
No GSX installed = no freeze.
Also tried FSRealistic on/off. BAtc on/off. Same: freeze as long as GSX is installed.
Yes, using Navigraph.
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Forget BATC! I wrote that thead, and it has been updated long time ago.
It seems you haven't read what I wrote. You might been initially MISLEAD it was BATC, likely because you tried removing it and it seemed to have stopped the crashes. So now, you are still being mislead "it's GSX", because you still have GSX but, as I've said in my previous post, if the REAL cause of the problem is that something in the Navdata in that area has a problem which would cause the sim to crash when queried using the standard Simconnect Navdata API, that BOTH GSX and BATC use, the only way to fix the crash would be removing BOTH.
Fact is: GSX istalled = freeze at KIAH.
No GSX installed = no freeze.
Yes, using Navigraph.
It doesn't seem you tried these combinations:
1) GSX NOT Installed, BATC Installed, Navigraph Installed
2) GSX NOT Installed, BATC Not Installed, Navigraph Installed
3) GSX Installed, Navigraph Not Installed
If you are getting a crash with case #1, but not with case #2, it means the Navdata "alone" is not a problem, but it becomes a problem when queried from Simconnect so, it's a simulator/Simconnect issue, since it affects both GSX and BATC.
If you are NOT getting a crash with case #3 (which is MY situation), it clearly proves GSX is not the problem, so back to explanation of case #1 and #2
Of course, I'm going to test again with Navigraph Navdata installed now.
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Yeah, when I get time I will try without NG data.
Edited above with BATC and/or FSRealistic on/off.
No difference: as long as GSX (and/or NG?) is installed = freeze.
Will update flightsim forum thread accordingly...
Edit - quick test before wife comes home.
Test #3: GSX, no Navigraph.
Uninstalled Navigraph data 2510. Uninstalled Fenix Navigraph package. No BATC. Ie 'only' GSX running. Full cold&dark startup Fenix gate E3. Couldn't import SB FPL (tells me NG was successfully uninstalled), so programmed it manually.
After startup, started taxing out for RWY15L. After 30sec = FREEZE. Sound still playing.
Test #2: Navigraph, no GSX.
Installed NG cycle + Fenix Package. No BATC. GSX unlinked.
Again: Fenix C&D E3. Could now import SB FPL (ie NG working). No GSX option in the menu (ie GSX unlinked/uninstalled successfully).
Starting up. Taxing out. Depart... NO FREEZE.
All points to GSX to me...
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It doesn't seem you tried these combinations:
1) GSX NOT Installed, BATC Installed, Navigraph Installed
2) GSX NOT Installed, BATC Not Installed, Navigraph Installed
3) GSX Installed, Navigraph Not Installed
If you are getting a crash with case #1, but not with case #2, it means the Navdata "alone" is not a problem, but it becomes a problem when queried from Simconnect so, it's a simulator/Simconnect issue, since it affects both GSX and BATC.
If you are NOT getting a crash with case #3 (which is MY situation), it clearly proves GSX is not the problem, so back to explanation of case #1 and #2
Of course, I'm going to test again with Navigraph Navdata installed now.
I tested these scenarios with the exception of BATC as I do not own it so cannot test with it installed. I removed everything including Navigraph and only had GSX installed and I can reproduce my issues.
If I try to start a flight at IAH with GSX running (default scenery or FSDT scenery) I get the freeze 90% of the time when trying to load the flight (This started around July so occurring in SU2 and SU3, I am not in the SU4 beta). If I can make it in, I get a freeze shortly after loading or if I interact with GSX (call for services or restart Couatl via GSX menu).
I am only getting CTDs in a scenario where I fly over the IAH area (within about 10 miles it seems). So if I start a flight at HOU, for example, take a northbound SID that takes me in close proximity to the IAH area, I get CTD.
All of these symptoms are no longer an issue when after disabling GSX (either unlink, or exiting Couatl via the taskbar while at the MSFS 2024 main menu before loading a flight). If I disable GSX, load into IAH, then restart it, I get a freeze.
So currently, if I am flying anywhere in the IAH area, or in or out of IAH, I am disabling GSX via the taskbar, and having no issue. I then restart Couatl after leaving the area. If IAH is my destination, I disable GSX before getting close. No issues once GSX disabled (of course other than not being to use GSX at the airport).
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Just had a ctd approaching kiah with pmdg 777. Never had this before. Also had issues loading into kiah sometimes. I dont see any weird logs in gsx logs.
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Umberto — what is the game plan to get this fixed?
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Umberto — what is the game plan to get this fixed?
As I said already, in order to "fix" something, I should be able to reproduce it first. Right now, I can't, even with Navigraph, GSX and BATC all together. I'm using the latest SU4 Beta, not sure if this might be a factor.
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Umberto — what is the game plan to get this fixed?
As I said already, in order to "fix" something, I should be able to reproduce it first. Right now, I can't, even with Navigraph, GSX and BATC all together. I'm using the latest SU4 Beta, not sure if this might be a factor.
As I said already, is there something I can add such as logs or screen grabs, videos etc? I’m still widely available to schedule a screen share or discord call. “TheDavid” is also available to join a call as well to help get this resolved as soon as possible.
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Umberto — what is the game plan to get this fixed?
As I said already, in order to "fix" something, I should be able to reproduce it first. Right now, I can't, even with Navigraph, GSX and BATC all together. I'm using the latest SU4 Beta, not sure if this might be a factor.
As I said already, I am happy to meet or provide anything you need to assist troubleshooting this issue. If there is any kind of logging from event viewer, windows, GSX, FS2024, anything at all, I am happy to assist. I just need some direction. It is most unfortunate this seems to only be impacting customers at random. As stated, this started on my machine around the time that PIGS and GSX Livery Manager was implemented. I am not sure if that is related or not but maybe something in that update or a subsequent one does not agree with the IAH area for some users? I am using the livery manager to omit any non US liveries to reduce the number of sim objects.
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Umberto — what’s the plan of action going forward? Let us know please.
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Umberto — what’s the plan of action going forward? Let us know please.
As I said already, in order to "fix" something, I should be able to reproduce it first. Right now, I can't, even with Navigraph, GSX and BATC all together. I'm using the latest SU4 Beta, not sure if this might be a factor.
I can only try wild guesses. Do you have a traffic pack installed, like FSLTL or FS Traffic ? If yes, trying to see if you can stop the crash by temporarily disabling those (if you use the Addon Linker, it should be easy to do).
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Hey Umberto. I tried that this afternoon. I removed FSLTL completely. Unfortunately it still freezes at IAH on spawn, with GSX running.
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Hey Umberto. I tried that this afternoon. I removed FSLTL completely. Unfortunately it still freezes at IAH on spawn, with GSX running.
I had high hopes for this, because the ONLY thing "unusual" KIAH does compared to a normal scenery, is that it uses whatever 3rd party traffic products you might have, and use some of the models there to use as static airplanes inside the maintenance hangar. So, maybe, a problem with one of those models might cause a crash, and this was the ONLY thing I haven't tried recently.
So, if you say your only 3rd party traffic product is FSLTL, and you are sure it's not active in the Community folder, then we are back at the "Can't reproduce it" step.
FYI, KIAH will search for models to use from the following folders:
"fsltl-traffic-base"
"justflight-aircraft-traffic-fleet"
"aig-aitraffic-oci-beta"
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Umberto - throughout the troubleshooting steps of this thread, I know myself and other users are having the issue even when using default IAH scenery, removing FSDT IAH. So not sure that helps with anything.
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I know myself and other users are having the issue even when using default IAH scenery, removing FSDT IAH.
That's changes everything! There must some issue in the KIAH area then, like Navdata or something else around there.
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I know I’ve tried a completely empty community folder. Fresh install. Everything works fine. As soon as I add GSX to the mix, I start seeing symptoms. FSDT IAH works fine as long as GSX isn’t running.
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As soon as I add GSX to the mix, I start seeing symptoms. FSDT IAH works fine as long as GSX isn’t running.
Now you are saying something different, compared to before, when you said even the default KIAH caused a crash. Have you then tried the default KIAH with GSX ?
If it's only GSX+KIAH, see my previous reply about AI Traffic used as static, which is something extra GSX does at KIAH. Of course, I repeated multiple times a simple test like this with "GSX+KIAH" and of course other add-ons like Fenix, in one of my first replies:
https://www.fsdreamteam.com/forum/index.php/topic,33602.msg211131.html#msg211131
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I have made this point a few times. Myself and several others have stated the issue is occurring with default KIAH as well. Yes I have tried an empty community folder with nothing but GSX in it and an aircraft that is native FS2024. I also have AI traffic disabled in the sim.
It comes down back to my notes earlier in this thread. If GSX is disabled, I have no issues at all with any combination of addons at KIAH. If I try to spawn at KIAH (default scenery or not) with GSX running (no matter if community folder is vanilla or not), I get a freeze. Sometimes I can get loaded in and the freeze occurs within a few minutes or in taxi. Now, if I’ve left another airport and fly over IAH, I get a crash to desktop if GSX is running. Again, if I disable GSX I get no issues at all.
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If you get a crash AT KIAH, no matter if you use a default scenery or FSDT, then it's clearly not a problem of the scenery. Since I can of course run GSX at KIAH with no issues, that leaves only those possibilities why you are getting a crash there, but I can't:
There's a problem with the Navdata (the API or the data itself) in the KIAH area, GSX makes the normal Simconnect query to it, and that cause a crash because of a problem in Simconnect itself (bug in the sim) or a problem in the Navdata (that can be either default or 3rd party).
So, unless you have another add-on that also makes a Simconnect call to get data about the airport using the Navdata API, you won't see the crash until you enable GSX.
Now, why I can't reproduce it, when I already tried with and without Navigraph ( default or 3rd party Navdata ) ?
- Bug in the sim. I'm using the latest SU4 Beta. According to the latest release notes, they HAVE fixed two overflow (crashing) bugs in Simconnect, and in the previous beta, they fixed a bug with the Facilities API (which is what we call "Navdata API" ). I don't know if these were *new* bugs introduced with the SU4 Beta, or new *fixes* for bugs that has been there before, that would change in case you either have or not have the SU4 Beta.
- Assuming it's NOT that Simconnect bug that has been supposedly fixed in the latest beta, your source of the bad data in the KIAH area might not be default Navdata or Navigraph (which were the only combinations I tried), but something else.
The only thing sure, seems that is NOT the scenery.
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I would agree it’s not the scenery. That assumption was made earlier in the thread through troubleshooting. I am using navigraph but have tried also with that uninstalled. This issue first started for me around the time PIGS and the ground service model controls were implemented. So back in SU2 days. I have not tried the SU4 beta personally but I know someone else on this thread has and still sees the issue. Not sure if that was the most recent beta release though.
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Yezzzz! Positive result here.
Same flight as was a sure freeze earlier:
* FSDT KIAH + GSX.
* No injected traffic.
* Updated Navigraph Airac to 2511.
* Fenix A320 Frontier.
* SimBrief FPL KIAH-KDFW.
* Start E2 C&D.
* Load AC via EFB: GSX Fuel+Payload.
* GSX pushback...
Taxied out for 15L, departed, left KIAH area...no freeze.
All good! Remark this is on MSFS024 SU4beta .19.
Might be .19 fixed it, as I did get a freeze on earler betas.
PS! SU4 much better than SU3 (performance, night lighting etc), so recommend ppl to try it at this stage.
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Yezzzz! Positive result here.
Same flight as was a sure freeze earlier:
* FSDT KIAH + GSX.
* No injected traffic.
* Updated Navigraph Airac to 2511.
* Fenix A320 Frontier.
* SimBrief FPL KIAH-KDFW.
* Start E2 C&D.
* Load AC via EFB: GSX Fuel+Payload.
* GSX pushback...
Taxied out for 15L, departed, left KIAH area...no freeze.
All good! Remark this is on MSFS024 SU4beta .19.
Might be .19 fixed it, as I did get a freeze on earler betas.
PS! SU4 much better than SU3 (performance, night lighting etc), so recommend ppl to try it at this stage.
That is great news. I will hold my breath until SU4 is released. Umberto hasn't been able to replicate the issue yet, though as you've seen MANY people are having the issue on SU3. Do you mind posting in here periodically until SU4 is out to see how your experience continues? I know this is a pain to do, but I figure its worth a shot of asking you.
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I think there might be a critical fix that would affect GSX:
https://forums.flightsimulator.com/t/sim-update-4-beta-1-6-23-0-release-notes-november-7-2025/746005
Fixed SimConnect_SubscribeToFacilities(_EX1) that has been broken on SU4
We surely call this function, because it's the one that allows GSX to get all data for an airport.
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I think there might be a critical fix that would affect GSX:
https://forums.flightsimulator.com/t/sim-update-4-beta-1-6-23-0-release-notes-november-7-2025/746005
Fixed SimConnect_SubscribeToFacilities(_EX1) that has been broken on SU4
We surely call this function, because it's the one that allows GSX to get all data for an airport.
Umberto - Quick follow up question. I am hopeful this fixes the issue. However, the question I have is if it broke in SU4 as you say, I just want to remind that I am not on SU4. I am on SU3 and have had this issue since SU2. As stated, this started for me around the time the PIGS system and the ground service vehicle livery manager were implemented into GSX.
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Umberto - Quick follow up question. I am hopeful this fixes the issue. However, the question I have is if it broke in SU4 as you say, I just want to remind that I am not on SU4. I am on SU3 and have had this issue since SU2. As stated, this started for me around the time the PIGS system and the ground service vehicle livery manager were implemented into GSX.
If you don't count the last 2 month, GSX had an average (we measured it) time between updates of about 8-9 days. This means, ANYTHING bad it happen to your sim can possibly happen after a GSX, just because there has been so many.
It's really impossible that PIGS could crash the sim on a specific airport, since *nothing* in the PIGS has any relationship with the airport, they are strictly tied to the airplane profile, and the only thing that would affect them is the airplane door configuration, which would at most cause the PIGS to disappear.
However, a bug in the Facilities API in the sim surely can crash the sim and yes, you can be mislead is "caused" by GSX, but of course it can't work without that API so, we should assume it should work.
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All good in latest SU4 beta .25 msfs2024.
Tried a flight in the pmdg777F using gsx to load and pushback.
Dunno if the 777 have had these freezes though. Not tried it at KIAH for a long time...
All was fine at least ;)