I still can't complete a single flight, regardless what I fly or where I fly.  As an example, XP12 just crashed with no crash error at the end of the file.

0:24:43.780 I/SCN: Loading sim objects for airport VA64
0:26:57.650 I/SCN: Loading sim objects for airport 87W
0:28:53.968 LiveTraffic WARN  LTRealTraffic.cpp:691/ProcessFetchedData: RealTraffic has no traffic at all! (full_count=0)

Asking ChatGPT why XP12 crashed produced this response.

'XP12 likely hung or crashed silently
No --=={This application has crashed!}==-- message appears.
This usually happens when a plugin or scenery component causes the sim to freeze, rather than trigger a standard crash.
In other words, it’s not a clean “crash” that writes to the log; it’s a hard hang.
Plugin or scenery is the probable cause
The last entries are all LiveTraffic warnings. While the plugin is unlikely to crash XP12 on its own, combination of heavy custom scenery + LiveTraffic can cause a freeze that leaves no log.
Your simHeaven_X-World_America tiles and Global_Forests_v2 were heavily loaded just before the freeze.

Memory pressure / system limits

DSF load times earlier in the log were very long (millions of milliseconds), suggesting XP12 was handling large scenery files.
If your system ran low on RAM or VRAM, XP12 can lock up without logging a fatal error.'

I was running with SimHeaven, Global Forests and Real Traffic - what I would consider the bare minimum addons for an enjoyable sim experience.  As others have said, these addons are pretty standard.  My system, with those addons, can't be running out of resources!

1 hour ago, MrBitstFlyer said:

I still can't complete a single flight, regardless what I fly or where I fly.  As an example, XP12 just crashed with no crash error at the end of the file.

0:24:43.780 I/SCN: Loading sim objects for airport VA64
0:26:57.650 I/SCN: Loading sim objects for airport 87W
0:28:53.968 LiveTraffic WARN  LTRealTraffic.cpp:691/ProcessFetchedData: RealTraffic has no traffic at all! (full_count=0)

Asking ChatGPT why XP12 crashed produced this response.

'XP12 likely hung or crashed silently
No --=={This application has crashed!}==-- message appears.
This usually happens when a plugin or scenery component causes the sim to freeze, rather than trigger a standard crash.
In other words, it’s not a clean “crash” that writes to the log; it’s a hard hang.
Plugin or scenery is the probable cause
The last entries are all LiveTraffic warnings. While the plugin is unlikely to crash XP12 on its own, combination of heavy custom scenery + LiveTraffic can cause a freeze that leaves no log.
Your simHeaven_X-World_America tiles and Global_Forests_v2 were heavily loaded just before the freeze.

Memory pressure / system limits

DSF load times earlier in the log were very long (millions of milliseconds), suggesting XP12 was handling large scenery files.
If your system ran low on RAM or VRAM, XP12 can lock up without logging a fatal error.'

I was running with SimHeaven, Global Forests and Real Traffic - what I would consider the bare minimum addons for an enjoyable sim experience.  As others have said, these addons are pretty standard.  My system, with those addons, can't be running out of resources!

What joes chat got know about anything. This ai nonsense is gone insane 

39 minutes ago, mjrhealth said:

What joes chat got know about anything. This ai nonsense is gone insane 

Oh, ‘AI nonsense has gone insane’? Ignoring anything that might help is clearly the sane approach.

My XP12 crashes every flight, and despite my best efforts (mostly guessing and hitting buttons), I haven’t solved it. Flight simming is my main leisure activity, so this is pretty disheartening. I’m using every tool I can, including AI, alongside advice from experienced simmers. If even one solid lead comes from it, it’s worth it.

Practical insights on why XP12 crashes with certain plugins or scenery would be far more useful than critiques of which tools I choose to use.

Edited December 10, 2025Dec 10 by MrBitstFlyer

I don't use Live Traffic, I use Traffic Global and suffered from freezing issues, they have been corrected with Jim's update... wonder if you are having the same issue. Have you tried to fly without live traffic?

7 hours ago, MrBitstFlyer said:

I still can't complete a single flight, regardless what I fly or where I fly.  As an example, XP12 just crashed with no crash error at the end of the file.

0:24:43.780 I/SCN: Loading sim objects for airport VA64
0:26:57.650 I/SCN: Loading sim objects for airport 87W
0:28:53.968 LiveTraffic WARN  LTRealTraffic.cpp:691/ProcessFetchedData: RealTraffic has no traffic at all! (full_count=0)

I replied in your DM's.  Check it out.

5 hours ago, MrBitstFlyer said:

I’m using every tool I can, including AI, alongside advice from experienced simmers. If even one solid lead comes from it, it’s worth it.

@mjrhealth That’s how I roll every single day. 
AI saves me literally hours a day. 
Yes, you have to prompt it well. 
No, it’s not always right. 
Yes, it will massively HELP you go at problems successfully. 

I have a copy+paste procedure for cases just like this:

This is a guideline on how to cure your X-Plane problems of crashing or device loss errors (DLE):

1.) Make sure your operating system is in prime shape. No overclocking. Latest drivers. Default graphic settings (no esoteric Nvidia settings, etc.), no paranoid anti-virus, no "I got this on a cool reddit forum with Windows tips" stuff.

2.) Remove all third party content from your X-Plane installation. Physically move them somewhere else, disabling them in X-Plane is not enough. This includes plugins, aircraft, scenery. If you are not sure you can do this reliably, just delete everything and install X-Plane fresh.

3.) Fly a default aircraft for a very long time. Let it go on autopilot if you don`t have the time, but fly a default aircraft in a default ("vanilla") simulator setup until it crashes or you are sure that it is stable. The longer the better, I personally recommend to use it in this state for several long flights until you declare it stable.

4.) If the simulator crashed or you suffer a device loss error, file a bug with Laminar Research (google X-Plane bug reporter). Wait for LR to fix the problem. You can now post here and let us know about your problem, maybe someone can spot something wrong with your system that you missed.

5.) If you completed the long testing run with no problem, you can install your FIRST add-on. ONLY ONE! Repeat the long duration testing run. If XP crashes or has a DLE, you have found the offending third-party item. Do not use it anymore. Contact the developer of said item to fix it.

6.) Add your NEXT  add-on. Repeat testing, discarding all add-ons that cause crashes or DLE´s.

Remember, there are no "must have" add-ons. There are only compatible or incompatible add-ons. It is the developer´s responsibility to make his add-on compatible or take it up with LR if the problem is not on his side.

 

5 hours ago, UrgentSiesta said:

@mjrhealth That’s how I roll every single day. 
AI saves me literally hours a day. 
Yes, you have to prompt it well. 
No, it’s not always right. 
Yes, it will massively HELP you go at problems successfully. 

That makes 2 of us 🙂

Love my Copilot... but I have to modulate the questions with care 🙂

The problem with AI is the same as the problem with guns and fast cars - humans often do not know how to use tools safely/correctly. Sitting there by themselves, neither guns nor cars kill anyone.

Current AIs (LLMs) are largely glorified google search machines. They can´t think, they can just look up stuff and condense what they found incredibly well.

This can definitely save you the time to read up on stuff yourself, but ultimately it´s knowledge is limited to the "knowledge out there". 

If someone (like the staff at Laminar) is good at reading a log.txt, but never posted anything specific about how to do that, AI will be clueless. 

In reading @MrBitstFlyer post I can sense someone who is very set in his beliefs and does not like to waiver from them. This is a good value in many cases, but here I believe it stops him from acknowledging the problem, even as he already sees it.

There is a famous sentence by Danish poet Christian Morgenstern, roughly translated as:

Because it can not be what must not be.

tl;dr: Get rid of those plugins and addons that cause your problems. Go back to MSFS if "you can´t live without them." Sorry to be so blunt, but some people need that. You are welcome.

Edited December 11, 2025Dec 11 by Litjan

Just to clarify my intention: I’m genuinely trying to understand what’s causing the issue I’m seeing, and AI was simply one of the tools I explored to help interpret the log. I’m well aware of its limitations, but if it points me in a direction I might not have considered I would think it a useful tool to use.

I also want to address the suggestion that I’m set in my ways. I’m actually very open to the idea that an add-on, a plugin, or even something on my own PC could be contributing to the issue. In fact, I can run XP12 successfully without any addons, which is why I’m trying to narrow down exactly where the conflict begins. My goal is simply to understand the problem fully and troubleshoot it effectively.  What is really strange is that adding ANY addon leads to a crash which doesn't make much sense - which is making me think the problem is outside XP12.

Regarding the personal remarks and the comment that I should “go back to MSFS,” I have to admit I was surprised, especially coming from someone whose posts I’ve respected up to now. I’d prefer to keep the discussion focused on solving the technical issue rather than on assumptions about my motivations or preferences.

18 hours ago, MrBitstFlyer said:

I was running with SimHeaven, Global Forests and Real Traffic - what I would consider the bare minimum addons for an enjoyable sim experience. 

Huh, I must have misinterpreted the above, then 😂.

Follow my instructions four posts above, and you shall have your answer - which is "all you seek". 

Regarding the personal remarks and the "I am taking my ball and leave"... I have seen a lot. Enough troubleshooting "help me with my crashes" threads to guesstimate where one is heading. If I was wrong - sorry and all the better!

Edited December 11, 2025Dec 11 by Litjan

49 minutes ago, Litjan said:

19 hours ago, MrBitstFlyer said:

I was running with SimHeaven, Global Forests and Real Traffic - what I would consider the bare minimum addons for an enjoyable sim experience. 

Huh, I must have misinterpreted the above, then 😂.

I’ve followed the suggestions you gave a few posts earlier, beginning with a completely fresh install of XP12 with nothing added — and XP12 runs perfectly in that state. What I described earlier is simply where I’d like to end up with my setup (SimHeaven, Global Forests, and visible traffic). It wasn’t meant to be the starting point for diagnosing the crashes.

56 minutes ago, Litjan said:

I am taking my ball and leave"

Regarding the comment about me “taking my ball and leaving,” I’m not sure where that impression came from. I’ve never suggested I’m about to leave XP12, that was something you brought up, and I genuinely don’t understand why. The thread title includes the word baffled because that’s exactly how I feel: after starting from a completely clean install, I get crashes as soon as I add any single addon.

• Adding Ortho only results in a message that my system can’t keep up — despite having run Ortho successfully before.

• Adding Global Forests only produces DSF size errors.

• Adding LiveTraffic only leads to a crash involving log_ATC.txt.

It is confusing, and that’s why I’m asking for help.

What I don’t understand is why this situation leads to comments about my personality. I’m simply trying to troubleshoot an issue methodically, and I’ve been following the advice given to me in good faith.

57 minutes ago, MrBitstFlyer said:

I get crashes as soon as I add any single addon.

Hmm, this is certainly not normal - and it is fairly obvious, that it  must be something that is isolated to your system...otherwise the relevant websites would explode with reports about this.

This puts point #1 of my "abnormal checklist" into the limelight. I would concentrate on making sure that everything is working as it should - even if everything ran fine before, an update to Windows or X-Plane could push a misconfigured system over the edge:

Make sure all drivers are up-to-date, not only the Nvidia driver, but also CPU and Chipset drivers. Make sure that your BIOS is not running any unusual options, and that you have no code running that messes with core and thread assignments (core affinity, project lasso, etc.). 

Last but not least, I assume that your files sit in a spot where X-Plane can access them with the highest possible bandwidth, no "usb drives", no "simlink" wizardry, etc.

A remote possibility is also some other ("background") programs running on your computer, maybe even unbeknownst to you, that hog all available cores, maybe even only occasionally.

21 minutes ago, Litjan said:

Make sure all drivers are up-to-date, not only the Nvidia driver, but also CPU and Chipset drivers. Make sure that your BIOS is not running any unusual options,

Thank you.  I just finished an update to all what you suggest.  EXPO was turned on in the BIOS (configures your RAM for those who like me didn't know!).  I turned that off but still the issue.  Something that was baffling me was running MSFS2024 without crashing issues, but I have noticed more stuttering in that sim.

Thinking this MUST be outside XP12, I created a bootable flash drive to run MemTest86 - and I think I have the culprit (I hope) - it detected a memory fault!  If I look at apps that display system specs, they all show I have 32Gb installed, which is correct, but MemTest86 detects a fault.

I wonder if XP12 is more unstable with a memory fault than MSFS (a vanilla XP12 is not affected by the memory fault?), because MSFS not crashing threw me.  Also I play a lot of Steam games and none of them crash.

Edited December 11, 2025Dec 11 by MrBitstFlyer

20 minutes ago, Litjan said:

Make sure all drivers are up-to-date, not only the Nvidia driver, but also CPU and Chipset drivers.

I used a program called 'Driver Easy' that scans your system and shows all the files that need updating (with buttons to do the updating).  I hope that hasn't been a problem!