# \[Solved\] How to fix Fatal Errors in UEFN related to Graphic Cards and Shaders and Derived Data problems

**URL:** <https://forums.unrealengine.com/t/solved-how-to-fix-fatal-errors-in-uefn-related-to-graphic-cards-and-shaders-and-derived-data-problems/2080832>\
**Category:** Issues and Bug Reporting\
**Tags:** unreal-engine, unreal-editor-for-fortnite\
**Created:** [October 22, 2024, 7:02pm UTC](https://forums.unrealengine.com/t/solved-how-to-fix-fatal-errors-in-uefn-related-to-graphic-cards-and-shaders-and-derived-data-problems/2080832 "2024-10-22T19:02:37Z")\
**Posts on this page:** 1\
**Showing post:** 2

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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:** [October 22, 2024, 7:08pm UTC](https://forums.unrealengine.com/t/solved-how-to-fix-fatal-errors-in-uefn-related-to-graphic-cards-and-shaders-and-derived-data-problems/2080832/2 "2024-10-22T19:08:16Z")

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hi @Fallen-Champ and ALL

[Fatal Error opening UEFN Project - General / Issues and Bug Reporting - Epic Developer Community Forums](https://forums.unrealengine.com/t/fatal-error-opening-uefn-project/2060432/7)

the command for the shortcut in Copy the line below into  
the (Properties - \> Target) Target box is

```auto
"C:\Program Files\Epic Games\Fortnite\FortniteGame\Binaries\Win64\UnrealEditorFortnite-Win64-Shipping.exe" -d3d11 -sm5 -DDC=None

```

 ![UEFNtargetLineUpdate](https://d3kjluh73b9h9o.cloudfront.net/original/4X/c/6/1/c61779fcd5ab267f020f6f42bc27738501f82bbe.png)

Then click the button “Apply”, then click “Ok”

-DDC=None will stop Derived Data Content

If you want to restart  
-DDC=Cold will stop Derived Data Content and reload cold will rebuild the Derived Data Content

Feedback from users requested how to set “Run as Administrator” to be permanently selected  
This is the original patched picture for the switch to DX11

 ![UEFN-DX11-Shortcut](https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/8/0/48025e1315b4b3e2c0c38a332bf923b731ed0f74.png)

In this picture click “Advanced” to give the picture below

 ![UEFNRunAdministratorLineUpdate](https://d3kjluh73b9h9o.cloudfront.net/original/4X/c/c/b/ccbcb99179a94b9e9e9bb03f5ca3013db697509f.png)

Tick/Click the box marked “Run as administrator” then Click “OK”  
Then click Apply and OK to return to desktop

When clicking the shortcut the prompt asks if  
“Do you want to make changes to your device?” Click “Yes”

UEFN will now “Run as Administrator” and may stop login failures

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