# UEFN crashes on launch

**URL:** <https://forums.unrealengine.com/t/uefn-crashes-on-launch/2134195>\
**Category:** Issues and Bug Reporting\
**Tags:** fortnite-creative, unreal-editor-for-fortnite, fortnite\
**Created:** [November 19, 2024, 12:30am UTC](https://forums.unrealengine.com/t/uefn-crashes-on-launch/2134195 "2024-11-19T00:30:59Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![NV7V](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NV7V](https://forums.unrealengine.com/u/NV7V)\
**Post date:** [November 19, 2024, 12:30am UTC](https://forums.unrealengine.com/t/uefn-crashes-on-launch/2134195/1 "2024-11-19T00:30:59Z")

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### Summary

Recent #UEFN updates have rendered my laptop incapable of launching the app. Right as it’s about to start, UEFN closes and throws up a crash reporter with:

GPU Crash Dump Triggered  
UnrealEditorFortnite\_Win64\_Shipping (x39 times)  
kernel32  
ntdll

Remedies tried: 🧵  
ran as Admin  
set Win8 compatibility mode  
-dx11 command line arg  
-dx12 command line arg  
-sm5 command line arg  
-sm3.1 command line arg  
verify UEFN files  
uninstall/reinstall UEFN  
install dx 12 shaders  
updated gpu drivers  
downgraded gpu drivers  
updated gpu drivers  
updated windows  
factory reset laptop  
reinstalled windows  
reinstalled launcher  
reinstalled UEFN  
deleted UEFN intermediate, saved, config files  
Mange 3D settings–\>UEFN = High Performance NVIDIA Processor  
Regedit --\>TdrDelay = 60  
Regedit --\>TdrDdiDelay = 60  
Deleted pak files, verified installation

### Please select what you are reporting on:

Unreal Editor for Fortnite

### What Type of Bug are you experiencing?

Stability

### Steps to Reproduce

Open Launcher  
Click Icon for Unreal Editor for Fortnite

### Expected Result

UEFN runs

### Observed Result

UEFN closes and throws up a crash reporter with:

GPU Crash Dump Triggered  
UnrealEditorFortnite\_Win64\_Shipping (x39 times)  
kernel32  
ntdll

### Platform(s)

Win 11 PC

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**Author:** ![MateoTheDoctor](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@MateoTheDoctor](https://forums.unrealengine.com/u/MateoTheDoctor)\
**Post date:** [November 25, 2024, 3:38pm UTC](https://forums.unrealengine.com/t/uefn-crashes-on-launch/2134195/2 "2024-11-25T15:38:40Z")

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omg! same problem. ive tried every method on the web but nothing seems to work. did you find a fix?

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**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\
**Post date:** [November 26, 2024, 7:15am UTC](https://forums.unrealengine.com/t/uefn-crashes-on-launch/2134195/3 "2024-11-26T07:15:48Z")

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> [@NV7V](#):
>
> Regedit --\>TdrDelay = 60

My Nvidia card needs 300 minimum to 500 for an early Nvidia graphics card  
Regedit --\>TdrDelay = 600

Then follow an old post  
[[RESOLVED] Issue with New Installations of UEFN - General / Announcements - Epic Developer Community Forums](https://forums.unrealengine.com/t/resolved-issue-with-new-installations-of-uefn/1771613/25)

dont use -dx12 -sm6  
use -dx11 -sm5 UEFN does not NEED tDX12 his and dont use NVidia SLI or DLSS.

Ue5.5 UEFN does not support the and the support has been removed

finally try  
[Any version crash!!! - Development / Programming & Scripting - Epic Developer Community Forums](https://forums.unrealengine.com/t/any-version-crash/1800563/5)

There is a patch in Latest EPGL Launcher 17.1 gives UEFN 32.11

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**Author:** ![NV7V](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NV7V](https://forums.unrealengine.com/u/NV7V)\
**Post date:** [November 27, 2024, 10:01pm UTC](https://forums.unrealengine.com/t/uefn-crashes-on-launch/2134195/4 "2024-11-27T22:01:17Z")

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I finally fixed this, yes. I have now fixed 3 identical machines that had this issue. (HP Victus Laptops.)

You can read about the whole thing here:

> <https://x.com/AlanNoon/status/1858901615459057798>

In short: Had to go into the BIOS and force the machine to use the GPU rather than the integrated graphics hardware.

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**Author:** ![MateoTheDoctor](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@MateoTheDoctor](https://forums.unrealengine.com/u/MateoTheDoctor)\
**Post date:** [December 14, 2024, 2:51am UTC](https://forums.unrealengine.com/t/uefn-crashes-on-launch/2134195/6 "2024-12-14T02:51:37Z")

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i also have a victus gaming laptop! thanks for the fix!