Crashes On X-Plane 12.4.0

[Jabari]

Support for this airplane has been lacking, but I'll try... I just installed X-Plane 12.4.0.  It crashed when loading a new flight.  I uninstalled / reinstalled it, same result.

Relevant logs...

2026-02-20 22:30:29 G5[Main.cpp:217]: XPLMEnable
2026-02-20 22:30:29 G5[Main.cpp:239]: D:\Program Files/X-Plane 12/Aircraft/X-Aviation/Beech Sundowner C23 v2/plugins/G5/
2026-02-20 22:30:29 G5[Main.cpp:240]: D:\Program Files/X-Plane 12/Aircraft/X-Aviation/Beech Sundowner C23 v2
2026-02-20 22:30:29 G5[Main.cpp:245]: Create MTUL
2026-02-20 22:30:29 G5[Main.cpp:250]: Settings and Failures
2026-02-20 22:30:29 G5[config.cpp:207]: Created Configuration: g5.cfg with path D:\Program Files\X-Plane 12\Aircraft\X-Aviation\Beech Sundowner C23 v2\g5.cfg
2026-02-20 22:30:29 G5[config.cpp:76]: Error Getting Data - added: g5_baro_selection
2026-02-20 22:30:29 G5[config.cpp:76]: Error Getting Data - added: g5_sky_pointer
2026-02-20 22:30:29 G5[config.cpp:76]: Error Getting Data - added: g5_auto_find_1024_displays
2026-02-20 22:30:29 G5[helpers.c:1207]: Error writing D:\Program Files\X-Plane 12\Aircraft\X-Aviation\Beech Sundowner C23 v2\g5.cfg: ReplaceFile failed: Access is denied.
2026-02-20 22:30:29 G5[Main.cpp:255]: Init Freetype
2026-02-20 22:30:29 G5[Main.cpp:258]: G5 Init
2026-02-20 22:30:29 G5[g5.hpp:1931]: Starting G5 Drawing Callback Process
2026-02-20 22:30:29 G5[g5.hpp:1937]: Loading Part 1 Complete
2026-02-20 22:30:29 G5[g5.hpp:49]: Loading G5 Images:
2026-02-20 22:30:29 G5[g5.hpp:95]: End Loading G5 Images:
2026-02-20 22:30:29 G5[g5.hpp:1944]: Set Uploader
2026-02-20 22:30:29 G5[g5.hpp:1952]: Loading Part 2 Complete
2026-02-20 22:30:29 G5[g5.hpp:1959]: Ended Loading G5 Drawing Callback Process
2026-02-20 22:30:29 G5[Main.cpp:261]: G5 Popup Init
2026-02-20 22:30:29 G5[popupSystem.cpp:631]: Init G5 Popup (B) No Bezel
2026-02-20 22:30:29 G5[popupSystem.cpp:631]: Init G5 Popup (A) No Bezel
2026-02-20 22:30:29 G5[popupSystem.cpp:631]: Init G5 Popup (B)
2026-02-20 22:30:29 G5[popupSystem.cpp:631]: Init G5 Popup (A)
2026-02-20 22:30:29 G5[popupSystem.cpp:631]: Init G5 Popup (A) No Bezel Duplicate
2026-02-20 22:30:29 G5[popupSystem.cpp:631]: Init G5 Popup (B) No Bezel Duplicate
2026-02-20 22:30:29 G5[Main.cpp:323]: RA
2026-02-20 22:30:29 G5[Main.cpp:326]: XPLMEnable Complete
2026-02-20 22:30:29 OpenGPWS[xplane.c:288]: OpenGPWS enabling
2026-02-20 22:30:29 OpenGPWS[xplane.c:332]: OpenGPWS successful
2026-02-20 22:30:29 [LES C23 Systems]: [datarefs.cpp:62]: Aircraft Path: Aircraft/X-Aviation/Beech Sundowner C23 v2/LES_Sundowner_G5.acf
2026-02-20 22:30:29 [LES C23 Systems]: [datarefs.cpp:73]: Aicraft Type: LES_Sundowner_G5.acf
2026-02-20 22:30:29 [LES C23 Systems]: [datarefs.cpp:85]: Aicraft Type (int): 5
2026-02-20 22:30:29 [LES C23 Systems]: [datarefs.cpp:90]: Aircraft Folder: Aircraft/X-Aviation/Beech Sundowner C23 v2
2026-02-20 22:30:29 [LES C23 Systems]: [datarefs.cpp:93]: Aircraft Folder with slash: Aircraft/X-Aviation/Beech Sundowner C23 v2/
2026-02-20 22:30:29 [LES C23 Systems]: [datarefs.cpp:39]: Aircraft Path: Aircraft/X-Aviation/Beech Sundowner C23 v2/LES_Sundowner_G5.acf
2026-02-20 22:30:29 [LES C23 Systems]: [datarefs.cpp:120]: G5 plugin found!
2026-02-20 22:30:29 [LES C23 Systems]: [datarefs.cpp:129]: G500 plugin found!
2026-02-20 22:30:29 libradio.plugin(v0.5)[libradio_plugin.c:195]: opengpws_intf_init
0:00:18.559 D/OBJ: CPU Geometry: 22689 (99.53%) 22689 (99.53%) "Aircraft/X-Aviation/Beech Sundowner C23 v2/objects/cockpit_objs/LES_Sundowner_cockpit_G5.obj"
Threading violation calling XPLMRegisterFlightLoopCallback (C:\Users\Administrator\builds\eiafPmXpN\0\x-plane\design\SDK\COMMON\xplanesdk\Src\XPLM\XPLMProcessing.cpp:44)
Violation by libradio by Saso Kiselkov (skiselkov.libradio - D:\Program Files\X-Plane 12\Aircraft\X-Aviation\Beech Sundowner C23 v2\plugins\libradio.plugin\win_x64\libradio.plugin.xpl)

 

[Goran_M]

Hi Jabari,

Thanks for the report. We're looking into this.

To diagnose the crash properly, we need a complete Log.txt from the session where the crash occurred. The one posted appears to be a partial capture.

To get a clean log:
  1. Start X-Plane
  2. Load the Beech Sundowner C23 G5
  3. Attempt to load a new flight until the crash occurs
  4. Immediately after the crash (or on restart), grab Log.txt from your X-Plane root folder before loading anything else

  Please either attach it directly to this thread or paste it in full. The more complete the log, the faster we can track this down.

  Thanks for your patience.

Edited February 21 by Goran_M

[Goran_M]

@Jabari
Checking in to see if you still want this resolved.

[Jabari]

On 2/21/2026 at 12:52 PM, Goran_M said:

Hi Jabari,

Thanks for the report. We're looking into this.

To diagnose the crash properly, we need a complete Log.txt from the session where the crash occurred. The one posted appears to be a partial capture.

To get a clean log:
  1. Start X-Plane
  2. Load the Beech Sundowner C23 G5
  3. Attempt to load a new flight until the crash occurs
  4. Immediately after the crash (or on restart), grab Log.txt from your X-Plane root folder before loading anything else

  Please either attach it directly to this thread or paste it in full. The more complete the log, the faster we can track this down.

  Thanks for your patience.

Here is the complete log file...

Log.txt

[Goran_M]

2 hours ago, Jabari said:

Here is the complete log file...

Log.txt 93.36 kB · 0 downloads

The very first thing I noticed is you have X-Plane 12 installed in your Program Files folder.  This will cause unpredictable problems.  Even Laminar recommend you install X-Plane anywhere outside of Program Files, like the root of a hard drive/partition.  The reason being, Windows restricts writing to the Program Files folder.  This is why the G5 can't save its config file, and it lets me know in the log (Access is denied).

As for the crash, I'll investigate this, but as far as what I can see, the crash is caused by a threading violation in the bundled libradio plugin. It's calling XPLMRegisterFlightLoopCallback from a background thread, which the latest release of X-Plane now enforces more strictly. I'll take a look and see what I can do with it.  It may be worth trying the C23 again, after it's moved.  I've seen X-Plane do some weird corrections when moved out of the Program Files folder.

Edited 7 hours ago by Goran_M

[Goran_M]

@Jabari Can you confirm or deny that you get a crash on loading the aircraft.  That it doesn't even get to the cockpit.  This may be a 12.4 issue that we need to look at and work around.