# FMOD causing UE4 crash at startup **URL:** \ **Category:** Unreal Engine\ **Created:** [March 23, 2022, 3:29pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567 "2022-03-23T15:29:39Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [March 23, 2022, 3:29pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/1 "2022-03-23T15:29:39Z")
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\ \>::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 ---
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [March 25, 2022, 4:36pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/2 "2022-03-25T16:36:31Z")
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! ---
**Author:** ![jeff\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/jeff_fmod/32/1766_2.png) [@jeff\_fmod](https://qa.fmod.com/u/jeff_fmod)\ **Post date:** [March 28, 2022, 4:24am UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/3 "2022-03-28T04:24:51Z")
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? ---
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [March 28, 2022, 5:13pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/4 "2022-03-28T17:13:35Z")
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. ---
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [March 30, 2022, 3:03pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/5 "2022-03-30T15:03:18Z")
Any more ideas here? Not sure what my next steps for troubleshooting this are. Thanks! ---
**Author:** ![jeff\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/jeff_fmod/32/1766_2.png) [@jeff\_fmod](https://qa.fmod.com/u/jeff_fmod)\ **Post date:** [March 30, 2022, 10:14pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/6 "2022-03-30T22:14:37Z")
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. ---
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [March 30, 2022, 10:59pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/8 "2022-03-30T22:59:58Z")
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: ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/7/750b7c7d44e84704a3c8e7236aa28746e31f0c2a.png) I’m also getting this error on load ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/1/1f8a7e2c90611f21694aaa4cbd2ab9fc0adbeb10.png) 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](https://qa.fmod.com/uploads/short-url/tETj2ZJZzcaarnW5Ip2070s2kfz.log) (223.4 KB) ---
**Author:** ![jeff\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/jeff_fmod/32/1766_2.png) [@jeff\_fmod](https://qa.fmod.com/u/jeff_fmod)\ **Post date:** [April 4, 2022, 4:38am UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/9 "2022-04-04T04:38:24Z")
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](https://fmod.com/profile#uploads)? ---
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [April 7, 2022, 8:17pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/10 "2022-04-07T20:17:06Z")
Uploaded! Let me know if you need anything else- and thanks again for the help. ---
**Author:** ![jeff\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/jeff_fmod/32/1766_2.png) [@jeff\_fmod](https://qa.fmod.com/u/jeff_fmod)\ **Post date:** [April 13, 2022, 6:49am UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/11 "2022-04-13T06:49:41Z")
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? ---
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [April 13, 2022, 7:02pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/12 "2022-04-13T19:02:33Z")
Interesting. Just did a verify on my 4.26.2 UE and still getting my crash unfortunately. ---
**Author:** ![jeff\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/jeff_fmod/32/1766_2.png) [@jeff\_fmod](https://qa.fmod.com/u/jeff_fmod)\ **Post date:** [April 19, 2022, 2:39am UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/13 "2022-04-19T02:39:02Z")
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? ---
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [April 20, 2022, 3:39am UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/14 "2022-04-20T03:39:38Z")
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. ---
**Author:** ![jeff\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/jeff_fmod/32/1766_2.png) [@jeff\_fmod](https://qa.fmod.com/u/jeff_fmod)\ **Post date:** [April 21, 2022, 6:01am UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/15 "2022-04-21T06:01:19Z")
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_. ---
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [April 22, 2022, 3:01pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/16 "2022-04-22T15:01:54Z")
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. ---
**Author:** ![jeff\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/jeff_fmod/32/1766_2.png) [@jeff\_fmod](https://qa.fmod.com/u/jeff_fmod)\ **Post date:** [April 29, 2022, 4:33am UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/17 "2022-04-29T04:33:24Z")
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. ---
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [May 10, 2022, 9:40pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/19 "2022-05-10T21:40:29Z")
Hey Jeff! So followed those instructions and got this error message after running the Validate FMOD command and the ensuing build: ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/c/c111716eca7ad72139368e2935162ebb1de9d4d7.png) The game also doesn’t play any sound at this point. Upon restarting the game, it still crashes with the same error. ---
**Author:** ![jeff\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/jeff_fmod/32/1766_2.png) [@jeff\_fmod](https://qa.fmod.com/u/jeff_fmod)\ **Post date:** [May 16, 2022, 7:13am UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/20 "2022-05-16T07:13:29Z")
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? ---
**Author:** ![bentrovato3](https://avatars.discourse-cdn.com/v4/letter/b/a587f6/32.png) [@bentrovato3](https://qa.fmod.com/u/bentrovato3)\ **Post date:** [May 17, 2022, 6:49pm UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/21 "2022-05-17T18:49:20Z")
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: ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/f/f951de042c54f6df26c52ba63728b73e493367c6.png) Next, before I validate FMOD I see that within the Content/FMOD folder I see that I now have the PrivateIntegrationData folder: ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/2/253194594b897c18718bf362063272eecb96a5ef.png) 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: ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/c/c55052941a505f51f95bfb2a5fb61809d4d0b4dd.png) I select ‘Yes’ and then get this notify: ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/6/6b046a11440d4e403a5430101bcb27fb1be882ae.png) I select okay and the FMOD Studio session automatically runs a build function and UE4 sends me this notify: ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/9/987d57743fb0afebc358572fcabf246f18854db4.jpeg) Looking in the Content/FMOD folder at this point I now have a Desktop folder and the PID folder: ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/5/59d8825cf869aefe2a2ed3def6542a0dc13cd629.png) 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: ![image](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/9/9950784126600034c66fb6961ddd8dcc0bbfb299.png) The output directory on FMOD Studio is correct and the validation tool says finished. Upon reloading, the project crashes. ---
**Author:** ![jeff\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/jeff_fmod/32/1766_2.png) [@jeff\_fmod](https://qa.fmod.com/u/jeff_fmod)\ **Post date:** [May 24, 2022, 5:43am UTC](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/22 "2022-05-24T05:43:37Z")
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](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567/17)? The bad AssetLookup.asset is in that directory and appears to be what’s responsible for the crash. [Next page](https://qa.fmod.com/t/fmod-causing-ue4-crash-at-startup/18567.md?page=2)