FMOD causing UE4 crash at startup

bentrovato3 · March 23, 2022, 3:29pm

Hello-

Recently attempted to clone a UE4 project, but now both the clone and the original are crashing after loading. Using:
UE4.26
FMOD 2.01.09
Windows 10

Here’s my crash log as well- any help would be amazing!

LoginId:1c6122fe433f29c643737792e111d71b
EpicAccountId:7592933f1b91432ba0f2727cb1d42e5b

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000038

UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_Engine
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_FMODStudioEditor!FFMODAssetBuilder::ProcessBanks() [C:\jk\workspace\Build__2.1__Unreal_Win\integrations\UE4\temp\FMODStudio\HostProject\Plugins\FMODStudio\Source\FMODStudioEditor\Private\FMODAssetBuilder.cpp:51]
UE4Editor_FMODStudioEditor!FFMODStudioEditorModule::ReloadBanks() [C:\jk\workspace\Build__2.1__Unreal_Win\integrations\UE4\temp\FMODStudio\HostProject\Plugins\FMODStudio\Source\FMODStudioEditor\Private\FMODStudioEditorModule.cpp:1236]
UE4Editor_FMODStudioEditor!FFMODStudioEditorModule::ProcessBanks() [C:\jk\workspace\Build__2.1__Unreal_Win\integrations\UE4\temp\FMODStudio\HostProject\Plugins\FMODStudio\Source\FMODStudioEditor\Private\FMODStudioEditorModule.cpp:387]
UE4Editor_FMODStudioEditor!TBaseFunctorDelegateInstance<void __cdecl(void),FDefaultDelegateUserPolicy,<lambda_b89097783886ec9b87f132c6787c1a3c> >::ExecuteIfSafe() [C:\Data\UE4\Unreal Engine\4.26\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:838]
UE4Editor_AssetRegistry
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll

bentrovato3 · March 25, 2022, 4:36pm

Updating here: I’ve found that if I delete the AssetLookup.uasset file in my UE4 project, the project will load with errors but it won’t crash. However, it then creates a new AssetLookup file which crashes the project the next time I load it.

Any help would be amazing, thanks!

jeff_fmod · March 28, 2022, 4:24am

I have not been able to reproduce this issue- is there anything more to your cloning process outside of copying and pasting the folder containing your UE4.26 project?

bentrovato3 · March 28, 2022, 5:13pm

Not to my knowledge. I used the UE4 ‘Clone’ function in the Epic Games menu if that makes a difference. I am also storing my UE project and FMOD project on Dropbox, which might possibly affect things but I have also tried copying the affected project onto a dedicated drive and still get the same error.

bentrovato3 · March 30, 2022, 3:03pm

Any more ideas here? Not sure what my next steps for troubleshooting this are. Thanks!

jeff_fmod · March 30, 2022, 10:14pm

Thanks for the extra info- I haven’t reproduced any crashes using the “Clone” function.
Is this a code project or a Blueprints-only project? I am a little suspicious of the Unreal integration version- the line numbers in your log aren’t aligning with anything in the UE4.26 2.01.09 integration. Can you please re-download and install the UE4.26 2.01.09 integration and share a complete crash log? It should be in the “{project}\Saved\Crashes” directory.

bentrovato3 · March 30, 2022, 10:59pm

Okay, re-downloaded and installed the 4.26 2.01 and I think you’re on the right track. I remember at a certain point during the cloning process UE threw an error that the project had FMOD 2.02 integration and I was using 2.01. I then downloaded 2.02 and that’s when the trouble started. After re-installing the 2.01.09 integration the project loads with a few load errors:

I’m also getting this error on load

I think most of those are my anim notifies that are missing (but safe in a copied folder). However now I think the issue is my FMOD project got updated to 2.02.06 and the UE4 integration is for 2.01.09

EDIT: I found a backup version of my FMOD project in 2.01.09 and I tried building that bank to a clone with the 2.01.09 integration, but still getting a crash. Here’s that log:
DRIVECLONE_RPG2.log (223.4 KB)

jeff_fmod · April 4, 2022, 4:38am

Thanks for the extra information- it’s not clear to me where this is crashing from that log.
I think I am going to need a reproduction to figure out why this is crashing and work out some recovery steps for you. Can you please upload this project to your FMOD profile?

bentrovato3 · April 7, 2022, 8:17pm

Uploaded! Let me know if you need anything else- and thanks again for the help.

jeff_fmod · April 13, 2022, 6:49am

Thank you for sending that over. I haven’t been able to reproduce a crash with this project, the AssetLookup is valid and has correct entries, cloning the project hasn’t caused any issues.
It did tell me that I had a mismatched editor version when I opened it though, can you please confirm you are using a public release build of UE4.26.2?

bentrovato3 · April 13, 2022, 7:02pm

Interesting. Just did a verify on my 4.26.2 UE and still getting my crash unfortunately.

jeff_fmod · April 19, 2022, 2:39am

Thank you for confirming, worth double checking at least.
I can see your previous AssetLookup entries appear to be corrupt/incomplete, with a size of 4kb. When I build the AssetLookup however it appears to be complete and has a size of 24kb. Can you please confirm this and tell me how big your AssetLookup file is?

bentrovato3 · April 20, 2022, 3:39am

I think you’re on the right track, but my AssetLookup looks like it’s also 24kb. I can open the project after deleting the AssetLookup file, though.

jeff_fmod · April 21, 2022, 6:01am

Strange, can you please share the AssetLookup file you have after a crash?
I think the best thing to do to get back to a working state would be to completely remove FMOD and add it back in. Can you please try:

Delete everything FMOD related from the project, including everything in Plugins/FMOD, Content/FMOD and Save/Autosaves/FMODStudio
Re-download the FMOD 2.01.09 integration and add it to your UE project
Link to your FMOD Studio project with Help>Validate FMOD.

bentrovato3 · April 22, 2022, 3:01pm

Gotcha. Uploaded the AssetLookup, and to confirm this is the Project/Content/FMOD/PrivateIntegrationData/AssetLookup.uasset

Will try removing and reinstalling FMOD and get back to you.

jeff_fmod · April 29, 2022, 4:33am

Thank you for sending that over- I have reproduced this crash by swapping in the AssetLookup.uasset file. I have also reproduced the succesive crashes after deleting and regenerating the AssetLookup.uasset file.
I have found that rerunning the validation tool has got the project back to a good state. Can you please try the following:

Delete evenything in “Content/FMOD”
Clear your project’s build path in FMOD Studio, under Edit>Preferences…>Build>Built banks output directory (optional):
Open your project in Unreal
With FMOD Studio still open, run the validation in Unreal by going to Help>Validate FMOD

Hopefully that also works for you. Please let me know if it doesn’t and I’ll see what else can be done.

bentrovato3 · May 10, 2022, 9:40pm

Hey Jeff!

So followed those instructions and got this error message after running the Validate FMOD command and the ensuing build:

The game also doesn’t play any sound at this point. Upon restarting the game, it still crashes with the same error.

jeff_fmod · May 16, 2022, 7:13am

Is there anything in the “Content/FMOD” directory after running the validation tool?

Is that “S:/Dropbox” folder a synced directory? That might explain the file corruption issue- maybe Dropbox is backing up while Unreal is trying to write to a file. Can you please try moving your project to a non-synced directory and rerun the FMOD validation tool?

bentrovato3 · May 17, 2022, 6:49pm

Moved the project to a non-synced directory but still getting the error. Here’s the timeline:

First popup upon load after cleaning out the Content/FMOD folder:

Next, before I validate FMOD I see that within the Content/FMOD folder I see that I now have the PrivateIntegrationData folder:

I am able to close and open the project without a crash at this point. Next, I run the validate FMOD tool and get this standard notification:

I select ‘Yes’ and then get this notify:

I select okay and the FMOD Studio session automatically runs a build function and UE4 sends me this notify:

Looking in the Content/FMOD folder at this point I now have a Desktop folder and the PID folder:

After clicking ‘Okay’ on the UE4 notify, Unreal reloads FMOD banks and the Content/FMOD folder now has what looks like a full build in there:

The output directory on FMOD Studio is correct and the validation tool says finished. Upon reloading, the project crashes.

jeff_fmod · May 24, 2022, 5:43am

I am not sure why is still has the PrivateIntegrationData directory after clearing out Content/FMOD. Can you please ensure that is removed and retry those recovery steps? The bad AssetLookup.asset is in that directory and appears to be what’s responsible for the crash.