fixed Su-25 - Crash On Mission Start

SDirickson · December 4, 2022

Since 2.8, I get a crash on mission start in the Su-25 (and only the Su-25). The mission will load and sit at mission start, waiting for the 'Fly' button to be clicked. I can change the view and look around. The moment I hit 'Fly', DCS crashes. It happens ever time, no matter the map, and only with the Su-25. All other modules (Flaming Cliffs or 3rd party) work just fine.

All mods removed, Open Beta 2.8, cleaned and repaired. Latest crashlog attached.

dcs.log-20221204-011009.zip

Flappie · December 4, 2022

Hi. It seems that one of your sim shaker script is causing this (look at the last lines below):

2022-12-04 01:10:08.465 INFO    EDCORE (Main): try to write dump information
2022-12-04 01:10:08.466 INFO    EDCORE (Main): # -------------- 20221204-011009 --------------
2022-12-04 01:10:08.466 INFO    EDCORE (Main): DCS/2.8.0.33006 (x86_64; Windows NT 10.0.22000)
2022-12-04 01:10:08.467 INFO    EDCORE (Main): D:\DCS\DCS World Open Beta\bin\DCS.exe
2022-12-04 01:10:08.467 INFO    EDCORE (Main): # C0000005 ACCESS_VIOLATION at 29B2C020 00:00000000
2022-12-04 01:10:08.470 INFO    EDCORE (Main): SymInit: Symbol-SearchPath: '.;D:\DCS\DCS World Open Beta;D:\DCS\DCS World Open Beta\bin;C:\Windows;C:\Windows\system32;SRV*C:\websymbols*https://msdl.microsoft.com/download/symbols;', symOptions: 528, UserName: 'Sam'
2022-12-04 01:10:08.470 INFO    EDCORE (Main): OS-Version: 10.0.22000 () 0x100-0x1
2022-12-04 01:10:08.727 INFO    EDCORE (Main): 0x000000000076C020 (DCS): SW + 0x32C530
2022-12-04 01:10:08.727 INFO    EDCORE (Main): 0x00000000006045C7 (DCS): SW + 0x1C4AD7
2022-12-04 01:10:08.728 INFO    EDCORE (Main): 0x0000000000007195 (lua): luaD_growstack + 0x4B5
2022-12-04 01:10:08.728 INFO    EDCORE (Main): 0x00000000000133C9 (lua): luaS_newlstr + 0x3EE9
2022-12-04 01:10:08.728 INFO    EDCORE (Main): 0x0000000000006B5B (lua): lua_setlocal + 0xA0B
2022-12-04 01:10:08.728 INFO    EDCORE (Main): 0x000000000000737F (lua): luaD_growstack + 0x69F
2022-12-04 01:10:08.728 INFO    EDCORE (Main): 0x0000000000006D4E (lua): luaD_growstack + 0x6E
2022-12-04 01:10:08.728 INFO    EDCORE (Main): 0x0000000000001C00 (lua): lua_pcall + 0x60
2022-12-04 01:10:08.728 INFO    EDCORE (Main): 0x0000000000064DB9 (edCore): ED_lua_pcall + 0x59
2022-12-04 01:10:08.728 INFO    EDCORE (Main): 0x00000000000606CB (edCore): Lua::Config::call_func + 0xEB
2022-12-04 01:10:08.728 INFO    EDCORE (Main): 0x00000000009167D9 (DCS): SW + 0x4D6CE9
2022-12-04 01:10:08.729 INFO    EDCORE (Main): 0x000000000082F2D9 (DCS): SW + 0x3EF7E9
2022-12-04 01:10:08.729 INFO    EDCORE (Main): 0x00000000007EE914 (DCS): SW + 0x3AEE24
2022-12-04 01:10:08.729 INFO    EDCORE (Main): 0x00000000007EF7E4 (DCS): SW + 0x3AFCF4
2022-12-04 01:10:08.729 INFO    EDCORE (Main): 0x0000000002289650 (DCS): AmdPowerXpressRequestHighPerformance + 0xF6064C
2022-12-04 01:10:08.729 INFO    EDCORE (Main): 0x0000000000BDCB52 (DCS): SW + 0x79D062
2022-12-04 01:10:08.729 INFO    EDCORE (Main): 0x0000000000015550 (KERNEL32): BaseThreadInitThunk + 0x10
2022-12-04 01:10:08.729 INFO    EDCORE (Main): 0x000000000000485B (ntdll): RtlUserThreadStart + 0x2B
2022-12-04 01:10:08.916 INFO    EDCORE (Main): Minidump created.
2022-12-04 01:10:08.917 INFO    Lua::Config (Main): stack traceback:
2022-12-04 01:10:08.917 WARNING LOG (14444): 2 duplicate message(s) skipped.
2022-12-04 01:10:08.917 INFO    Lua::Config (Main): stack traceback:
	[C]: in function 'LoGetFMData'
	[string "C:\Users\Sam\Saved Games\DCS.openbeta\Scripts\Export_BEH_Motion_Cls.lua"]:120: in function 'SimLuaExportAfterNextFrame'
	[string "C:\Users\Sam\Saved Games\DCS.openbeta\Scripts/SimShaker.lua"]:537: in function 'LuaExportAfterNextFrame'
	[string "C:\Users\Sam\Saved Games\DCS.openbeta\Scripts\SimShaker-export-core\ExportCore.lua"]:62: in function <[string "C:\Users\Sam\Saved Games\DCS.openbeta\Scripts\SimShaker-export-core\ExportCore.lua"]:56>

First things first:

Go to "Saved Games/DCS.../Scripts".
Rename "Export.lua"to "Export.lua.bak".
Ensure the problem is gone.

If my diagnosis is correct, you should ask for help in the Sim Shaker thread.

SDirickson · December 11, 2022

That did the trick, thank you very much!

Flappie · December 11, 2022

You're welcome. Thanks for your feedback.

Abburo · February 11, 2023

Hi there,

I am encountering the very same issue with SU25T and SU25, only difference in my case is about a BRUNNER CLS-E joystick base. The workaround with renaming export is working for me as well. Going to ask Brunner have a look anyway

Abburo · February 11, 2023

Adding my logs, where it seems the error is related to a corupt damage model. Anyway, by removin the export.lua SU25's are working just fine... no other repair/clean/update required.

dcs.log-20230206-170544.zip

Abburo · February 14, 2023

@Flappie

I went to Brunner support describing this issue and they've been answering as following:

Quote

- Has nothing to do with drivers . Is not a fault of, or solvable by, neither SimShaker nor Brunner.
- The Access Violation crashing the game is the result of the function call LoGetFMData in the DCS Lua API.
This is the function call that reads out the state of the flight model (speed, accceleration, etc).

- The fix simply disables any LUA extension so that function doesn't get called.

- The only ones able to fix this are Eagle Dynamics.

This error appeared to me after 2.8 version of DCS as well, before my SU25s were working just fine. Would you be able to report this to ED directly? Would be better as I am not the only one affected.

IIn the error logs can be found very easily there are some errors regarding a corrupted damage model for SU25s... don't know if those are related, but without that export.lua everything is working fine, but no force feedback...

Flappie · February 14, 2023

Hi @Abburo. You should have opened a new thread.

I see you're using the FrenchPack mod and it generates several Lua errors:

2023-02-06 16:52:34.670 ALERT   Scripting (Main): loadfile: [string "C:\Users\adria\Saved Games\DCS.openbeta\Mods/tech/FRENCHPACK 49..."]:161: unexpected symbol near ','
  ...
2023-02-06 16:52:37.947 ERROR   SOUNDER (Main): Failed to load /sounds/60/Sounders/GroundUnits/IFV/amx10rcr.lua: [string "/sounds/60/Sounders/GroundUnits/IFV/amx10rcr.lua"]:2: '=' expected near 'dofile'
2023-02-06 16:52:37.950 ERROR   SOUNDER (Main): Failed to load /sounds/60/Sounders/GroundUnits/WeaponSystem/IFV/toyota_desert.lua: [string "/sounds/60/Sounders/GroundUnits/WeaponSystem/IFV/toyota_desert...."]:9: '=' expected near '-'
  ...

You're also having a Combined Arms error:

2023-02-06 17:01:29.372 ERROR   Lua::Config (Main): load error ./Mods/tech/CombinedArms/Cockpit/Rangefinder_page.lua:can't open './Mods/tech/CombinedArms/Cockpit/Rangefinder_page.lua'.

You should try to:

Disable FrenchPack,
Run a DCS repair in "slow" mode.

Abburo · February 14, 2023

@FlappieDid that already .. clean/slow, repair, disabled all mods... by the point where i have reinstalled DCS and tried it on completely fresh version... same story...

Abburo · February 14, 2023

dcs.log-20230214-224105.zip

@FlappieReattaching error reproduction with the clean version of DCS.

The error is consistent, while the export.lua is present. Loosing export.lua I am loosing its functionalities.

Flappie · February 14, 2023

Ah, here we go:

2023-02-14 22:41:04.988 INFO    Lua::Config (Main): stack traceback:
	[C]: in function 'LoGetFMData'
	[string "C:\Users\user\Saved Games\DCS.openbeta\Scripts\Export_BEH_Motion_Cls.lua"]:120: in function <[string "C:\Users\user\Saved Games\DCS.openbeta\Scripts\Export_BEH_Motion_Cls.lua"]:42>

Please attach your "Export_BEH_Motion_Cls.lua" file.

Abburo · February 14, 2023

Export_BEH_Motion_Cls.lua

@Flappie

is about "cls_data_table["FMData"] = LoGetFMData()" as per Brunner support findings as well...

Edited February 14, 2023 by Abburo

Abburo · February 14, 2023

Looks like that LoGetFMData function was changed or broken in some of the previous updates... I used Su25s before 2.8 ...

Strange part is all other planes from FC3 are working fine, no issue... is just about SU25s

Flappie · February 14, 2023

OK. I'll try to reproduce your issue. If I suceeed, I'll report and we'll see what devs can find.

Please attach your "Export.lua" file.

Abburo · February 15, 2023

Export.lua

@Flappie here it is the export.lua file.

Thank you in advance

Flappie · February 15, 2023

Issue reproduced and reported. :thumbup:

Flappie · February 17, 2023

Hi @Abburo. Good news: a fix is coming to prevent DCS to crash. Bad news: the ExportBEH_Motion_Cls.lua script springs an error that guys at BRUNNER will need to fix. Here it is:

2023-02-17 20:42:28.571 ERROR   Lua::Config (Main): Call error LuaExportStop:[string "C:\Users\user\Saved Games\DCS\Scripts\Export_BEH_Motion_Cls.lua"]:133: attempt to index global 'c' (a nil value)
stack traceback:
	[C]: ?
	[string "C:\Users\user\Saved Games\DCS\Scripts\Export_BEH_Motion_Cls.lua"]:133: in function <[string "C:\Users\Flav\Saved Games\DCS.nightly\Scripts\Export_BEH_Motion_Cls.lua"]:132>.

The script "c:close()" call fails, because "c" has not been declared.

Please show them this error message so they can fix their script, and maybe you won't need to wait for ED's fix.

Edited February 17, 2023 by Flappie

Brunner · February 20, 2023

Hi, Diego from Brunner here

The above mentioned ExportBEH_Motion_Cls.lua script is an older version.

The current version works fine with the P-51D and only crashes with the Su-25, the culprit being LoGetFMData()

The current version of ExportBEH_Motion_Cls.lua, is shipped with the CLS2Sim installer.

After installing CLS2Sim, check the simulation folder for the subdirectory "Simulator plugin installers".

For convenience purposes I have also uploaded a mirror here:

https://cloud.brunner-innovation.swiss/static/downloads/DCS World plugin installer.exe

Best Regards

Diego

Abburo · February 20, 2023

@Flappie I just want to confirm that the fix provided by @Brunner sorted out the error you've highlighted earlier. Thank you both for your support !

Now, I'm just sitting cool and await ED fix for SU25s

Flappie · February 20, 2023

@Brunner Many thanks. No more error message on internal build either.

@Abburo The fix should be in the next OB update.

Abburo · March 13, 2023

@FlappieJust to confirm that v2.8 with MT solved the SU-25 crash as well. I'll keep you posted if I would find anything else related.

Thank you all for support!

Flappie · March 13, 2023

You're welcome.

fixed Su-25 - Crash On Mission Start

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