UEFN Crashes when opening project

jellyvish404 · September 27, 2023, 11:22pm

UEFN Crashes when opening one of my projects. Other projects open without problems.
I have tried:
Restarting my PC
Verifying game files
Running UEFN with fortnite open
Updating and re-installing graphics drivers
Modifying graphics driver settings
Closing all other applications
And other things from youtube vidoes, and forum posts. Nothing is working.

Here is the crash log:

Fatal error: [File:D:\build++Fortnite\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 949]
Rendering thread exception:
Fatal error!

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000040

0x00007ff765a80c2c UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction
0x00007ff7669ec35d UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction
0x00007ff765a80f55 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction
0x00007ff766a0d65c UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction
0x00007ff766ae6c0e UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction
0x00007ff7669e0bd4 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction
0x00007ff7669e4a57 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction
0x00007ff766d01427 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction
0x00007ff766cfe211 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction
0x00007ffa9c5c257d KERNEL32.DLL!UnknownFunction

Any help is greatly appreciated

SkylarGemDragon · September 28, 2023, 12:19am

Does it crash at ‘Opening Project’ at 79%? If so, try this fix https://x.com/equinoxfncreate/status/1693760971422978364?s=46&t=Nj9PUWgJu-_mXekb72mZjg

Very effective fix Equinox showed me

jellyvish404 · September 28, 2023, 1:24am

I don’t know why, but it works!

Thank you so much! Saved me a lot of work.

Tasty_Snak · October 13, 2023, 9:12am

I have tried this but the “fix” doesn’t work for me.
This wouldn’t have been a problem if I was in the strict habit of using version control, but because I have to learn lessons the hard way I have lost my project for good I think.
I really wish Epic would allow UEFN devs to use local servers for development. I kind of feel this might be due to multiplayer misconfiguration issues.
This is what I get as soon as the project loads to 36%.
Another interesting thing is the Epic Games Launcher will sometimes still say UEFN is running in the Library. I literally have to open my Task Manager and end all Epic tasks that are still running in order to open UEFN again, otherwise closing and reopening the Epic Games Launcher will still show UEFN running, even though I can’t access it!