# exception access violation

**URL:** <https://forums.unrealengine.com/t/exception-access-violation/1153600>\
**Category:** Issues and Bug Reporting\
**Tags:** crashes, bug, unreal-engine, fortnite-creative, unreal-editor-for-fortnite, fortnite\
**Created:** [May 3, 2023, 11:34pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600 "2023-05-03T23:34:28Z")\
**Posts on this page:** 20\
**Page:** 2

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**Author:** ![PonyPonyChimpan](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@PonyPonyChimpan](https://forums.unrealengine.com/u/PonyPonyChimpan)\
**Post date:** [August 21, 2023, 12:57pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/21 "2023-08-21T12:57:24Z")

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![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/2/d/82df65b1d86e5a8c25a2efe111a107257b3e6585.png)

This code let my UEFN crash.  
Then, i change to this code.

 ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/a/2/aa26c057007309eb6a065ad25cf46e873d17de27.png)

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**Author:** ![Gabriellho](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Gabriellho](https://forums.unrealengine.com/u/Gabriellho)\
**Post date:** [August 22, 2023, 8:20pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/22 "2023-08-22T20:20:00Z")

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For me it didnt happen because of a Verse code tho, so I think everyone has a different problem while getting this error, but I have seen a lot of people getting the error due to some Verse Code.

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**Author:** ![AceBabyyy](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/acebabyyy/32/750517_2.png) [@AceBabyyy](https://forums.unrealengine.com/u/AceBabyyy)\
**Post date:** [September 14, 2023, 5:06am UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/23 "2023-09-14T05:06:30Z")

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any update on this? I’m currently unable to open UEFN since my settings are set to “open last project”

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**Author:** ![Bug-Reporter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/bug-reporter/32/997076_2.png) [@Bug-Reporter](https://forums.unrealengine.com/u/Bug-Reporter)\
**Post date:** [November 7, 2023, 2:20pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/24 "2023-11-07T14:20:44Z")

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The status of UCB-1045 incident has been moved from ‘Needs Triage’ to ‘Closed’. Resolution Reason: ‘Fixed’

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**Author:** ![JJSlider](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jjslider/32/756573_2.png) [@JJSlider](https://forums.unrealengine.com/u/JJSlider)\
**Post date:** [November 7, 2023, 3:58pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/25 "2023-11-07T15:58:03Z")

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Hi! Experiencing the same

Unhandled Exception: EXCEPTION\_ACCESS\_VIOLATION reading address 0xffffffff4310dce8  
UnrealEditorFortnite\_Win64\_Shipping (times 8)  
kernel32  
ntdll

Sent the report, managed to keep editor running with a blank project, set Engine Scalability Settings to Performance Mode, and open my project for editing. However, landscape sculpting isn’t available, so when I change the preview back to D3D Shader Model 5, it crashes.

I’m using Lenovo Legion Y530 with Core i5 GTX 1050 Ti. I did try to fiddle with the .ini files to set preferences for DX11, but my card should support DX12 as well.

In addition, whenever UEFN crashes, it remains ‘Running’ on Epic Launcher. And I haven’t found any other way to close it properly than restarting my computer.

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**Author:** ![TLLupyon](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@TLLupyon](https://forums.unrealengine.com/u/TLLupyon)\
**Post date:** [November 24, 2023, 7:47pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/26 "2023-11-24T19:47:40Z")

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Hello, i been also having the same issue, to be honest the list goes on. Before this recent crash, when i opened the map it even states it could not update from Revision Control, nor was i able to update anything to it. Once again last night I was given this as a crash report

_Unhandled Exception: EXCEPTION\_ACCESS\_VIOLATION reading address 0x0000000000000038_

_UnrealEditorFortnite\_Win64\_Shipping_  
_UnrealEditorFortnite\_Win64\_Shipping_  
_UnrealEditorFortnite\_Win64\_Shipping_  
_UnrealEditorFortnite\_Win64\_Shipping_  
_UnrealEditorFortnite\_Win64\_Shipping_  
_UnrealEditorFortnite\_Win64\_Shipping_  
_UnrealEditorFortnite\_Win64\_Shipping_  
_UnrealEditorFortnite\_Win64\_Shipping_  
_kernel32_  
_ntdll_

I found out how to make a work around for it by deleting the world and reinstalling it from the “RC”, but i am tired of having to repeatedly restart my progress because of this glitch.

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**Author:** ![Orodex](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Orodex](https://forums.unrealengine.com/u/Orodex)\
**Post date:** [November 29, 2023, 8:08pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/27 "2023-11-29T20:08:57Z")

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Well, dammit, I have this problem too now. It’s on a pretty important brand deal project, I need this fixed asap, or I wont be able to work

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**Author:** ![BluePrism](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BluePrism](https://forums.unrealengine.com/u/BluePrism)\
**Post date:** [December 6, 2023, 2:05pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/28 "2023-12-06T14:05:37Z")

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Hi there, the same problem occured for my team and I while programming in verse our game. Everything worked well until we did a double reference in verse of two creative\_device classes.

We had a Team\_Manager referencing a UI\_Manager, and the UI\_Manager was also referencing Team\_Manager. This is what caused our problem. We fixed this issue by getting rid of one of the 2 references in our scripts.

All we did was going into the VSCode project without opening UEFN and removed one of the references.

After that we could launch back our project without failure. We think the problem comes from the fact that it somehow did a infinite loop on runtime by getting the references every frame.

Hope it helps some of you that code your game in Verse !

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**Author:** ![uSebasu](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@uSebasu](https://forums.unrealengine.com/u/uSebasu)\
**Post date:** [January 13, 2024, 11:31pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/29 "2024-01-13T23:31:52Z")

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Hello, I have already tried all the solutions that I have found but I cannot even enter the UEFN, the same crash appears when I open the UEFN, I already sent the crash report but I still have not been able to solve it, I would like to know if there is any Possibility that I can solve it pls.

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**Author:** ![Marcon](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Marcon](https://forums.unrealengine.com/u/Marcon)\
**Post date:** [January 17, 2024, 1:45am UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/30 "2024-01-17T01:45:22Z")

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That fixed it for me. You saved my project. Thank you.

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**Author:** ![scoopet](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/scoopet/32/777884_2.png) [@scoopet](https://forums.unrealengine.com/u/scoopet)\
**Post date:** [February 14, 2024, 12:07am UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/31 "2024-02-14T00:07:08Z")

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Appreciate this, it helped fix my project too. 👍 👍

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**Author:** ![denkoimamaire](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@denkoimamaire](https://forums.unrealengine.com/u/denkoimamaire)\
**Post date:** [April 29, 2024, 11:33am UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/32 "2024-04-29T11:33:50Z")

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I know some time has passed but 3 days ago i got the same crash, i still cannot enter uefn. Did you find a solution?

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**Author:** ![Jekyll\_H\_Y\_D\_E](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jekyll_h_y_d_e/32/712621_2.png) [@Jekyll\_H\_Y\_D\_E](https://forums.unrealengine.com/u/Jekyll_H_Y_D_E)\
**Post date:** [April 29, 2024, 12:01pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/33 "2024-04-29T12:01:29Z")

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Hello i expirience that issue with a map i worked just a few hours ago.

 ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/d/9/9/d9935f4a691eeb007408d213ad9cfaf8b32742e1.jpeg)

I open a few other Projekt in between. All other Projects are opening except that one.

Hope there is a solution

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**Author:** ![MiquelSangrador](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/miquelsangrador/32/734272_2.png) [@MiquelSangrador](https://forums.unrealengine.com/u/MiquelSangrador)\
**Post date:** [April 29, 2024, 2:02pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/34 "2024-04-29T14:02:56Z")

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Solutions I found to this problem, normally is due to a line of code that is generating this error.

Lines of code that produced the same error in my cases:

1. Trying to get information from a “[player]int = map{}” but I was trying it with an “enum” by error.

2. Trying to reference one “creative\_device” inside another one with “@editable” and the same in the other device so that it creates a loop and each of them had the reference to each other (just making the loop reference not actually putting in the reference)

Solution:

Go to the files you know is causing the problem, delete the line it is cousing it and then you can enter the project no problem.

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<div class="post-metadata">

**Author:** ![Jekyll\_H\_Y\_D\_E](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jekyll_h_y_d_e/32/712621_2.png) [@Jekyll\_H\_Y\_D\_E](https://forums.unrealengine.com/u/Jekyll_H_Y_D_E)\
**Post date:** [April 29, 2024, 4:57pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/35 "2024-04-29T16:57:12Z")

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at me it happened after Migrating an Texture from my other map what cause the Crash

not sure if is the function in the texture or the Migrate Process in general

Filed a report hope there is a fix because there are 60+ hours work in that map 😭 😢

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<div class="post-metadata">

**Author:** ![LuckofBuck](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/luckofbuck/32/677363_2.png) [@LuckofBuck](https://forums.unrealengine.com/u/LuckofBuck)\
**Post date:** [June 24, 2024, 6:07pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/36 "2024-06-24T18:07:43Z")

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@HalcyonKnight96 just ran into this issue with my game.

My issue was once I built my verse code, it crashed and then I couldn’t open the project again. To get into the project I went into the script, removed all the code, saved it which then allowed me to open the project with a bunch of errors.

After I found the piece of code that was messing it up for me. It ended up being an @editable to another verse script

```auto
game_manager := class<unique>(creative_device):
    

   #this @editable code would cause it to all break
    @editable
    KingOfTheHillManager : king_of_the_hill_manager = king_of_the_hill_manager{}

#other class file
king_of_the_hill_manager := class(creative_device):

    
    @editable
    GameManager : game_manager = game_manager{}

```

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<div class="post-metadata">

**Author:** ![xDomsi](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@xDomsi](https://forums.unrealengine.com/u/xDomsi)\
**Post date:** [December 20, 2024, 1:37pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/37 "2024-12-20T13:37:34Z")

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hi, did you fix the problem?

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<div class="post-metadata">

**Author:** ![xDomsi](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@xDomsi](https://forums.unrealengine.com/u/xDomsi)\
**Post date:** [December 20, 2024, 1:39pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/38 "2024-12-20T13:39:13Z")

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Hello, can I maybe send you my project too? I ve been trying 2 days now to solve the problem, but no chance …

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<div class="post-metadata">

**Author:** ![trentesc](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@trentesc](https://forums.unrealengine.com/u/trentesc)\
**Post date:** [February 25, 2025, 3:39pm UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/40 "2025-02-25T15:39:51Z")

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Thanks heaps, this worked for me

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<div class="post-metadata">

**Author:** ![MiquelSangrador](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/miquelsangrador/32/734272_2.png) [@MiquelSangrador](https://forums.unrealengine.com/u/MiquelSangrador)\
**Post date:** [February 28, 2025, 8:26am UTC](https://forums.unrealengine.com/t/exception-access-violation/1153600/41 "2025-02-28T08:26:49Z")

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I don’t know if it is too late but this is a way of solving the problem, it is caused by a loop reference, one verse file has the other as editable and the other way around, the solution is to make one of them an optional

 ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/c/7/4/c744e71463d69bd65d65b5cca84073a6964e1473.png)

In this case KingOfTheHillManager is the optional, you put the default value at false and then reference it.  
Very useful for cases like this one, here is the optional documentation for specific use cases:

> **[Option in Verse | Unreal Editor for Fortnite Documentation | Epic Developer...](https://dev.epicgames.com/documentation/en-us/uefn/option-in-verse)**
>
> The option type can contain one value or can be empty.

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