# IK Retargeter Causing UEFN To Crash

**URL:** <https://forums.unrealengine.com/t/ik-retargeter-causing-uefn-to-crash/2364753>\
**Category:** Issues and Bug Reporting\
**Tags:** fortnite-creative, unreal-editor-for-fortnite, UEFN, fortnite\
**Created:** [February 28, 2025, 5:20pm UTC](https://forums.unrealengine.com/t/ik-retargeter-causing-uefn-to-crash/2364753 "2025-02-28T17:20:40Z")\
**Posts on this page:** 1\
**Showing post:** 15

<div class="post-metadata">

**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:** [March 4, 2025, 9:42am UTC](https://forums.unrealengine.com/t/ik-retargeter-causing-uefn-to-crash/2364753/15 "2025-03-04T09:42:28Z")

</div>

hi @thejerenator ,

Looking at the most recent UEFN Log

Please can you [Verify your Installation using this post](https://forums.unrealengine.com/t/urc-exe-and-urc-dll-get-flagged-as-malware-from-microsoft-defender/1802519/5)

```auto
[2025.03.03-18.53.14:331][675]LogAssetEditorSubsystem: Opening Asset editor for IKRetargeter /DinosaurGame01/Dinos/RTG_Raptor.RTG_Raptor
[2025.03.03-18.53.14:332][675]LogChaosDD: Not creating Chaos Debug Draw Scene for world World_1

```

So the  
Opening Asset editor for IKRetargeter  
ON  
/DinosaurGame01/Dinos/RTG\_Raptor.RTG\_Raptor

```auto

[2025.03.03-18.53.14:374][675]LogActorComponent: RegisterComponentWithWorld: (/Engine/Transient.World_1:PersistentLevel.AnimationEditorPreviewActor_0.DebugSkelMeshComponent_0) Already registered. Aborting.

```

```auto
[2025.03.03-18.53.14:407][675]LogSkeletalMesh: Display: Waiting for skinned assets to be ready 0/1 (dino_Raptor) ...

```

The Crash error starts here, this is difficult because protected parts of UEFN do NOT have the symbols table links available, but as highlighted above the problem is a crash in  
Opening Asset editor for IKRetargeter

> [2025.03.03-18.53.14:785][675]LogWindows: Error: === Critical error: ===  
> [2025.03.03-18.53.14:785][675]LogWindows: Error:  
> [2025.03.03-18.53.14:785][675]LogWindows: Error: Fatal error!  
> [2025.03.03-18.53.14:785][675]LogWindows: Error:  
> [2025.03.03-18.53.14:785][675]LogWindows: Error: Unhandled Exception: EXCEPTION\_ACCESS\_VIOLATION writing address 0x0000000000000118  
> [2025.03.03-18.53.14:785][675]LogWindows: Error:  
> [2025.03.03-18.53.14:785][675]LogWindows: Error: [Callstack] 0x00007ff89bf59d96 ntdll.dll!UnknownFunction   
> [2025.03.03-18.53.14:785][675]LogWindows: Error: [Callstack] 0x00007ff792dd2e34 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction   
> [2025.03.03-18.53.14:785][675]LogWindows: Error: [Callstack] 0x00007ff78cec2f08 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction   
> [2025.03.03-18.53.14:785][675]LogWindows: Error: [Callstack] 0x00007ff788376da3 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction   
> [2025.03.03-18.53.14:785][675]LogWindows: Error: [Callstack] 0x00007ff7883752d2 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction   
> [2025.03.03-18.53.14:785][675]LogWindows: Error: [Callstack] 0x00007ff78838239f UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction   
> [2025.03.03-18.53.14:785][675]LogWindows: Error: [Callstack] 0x00007ff788381638 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction   
> [2025.03.03-18.53.14:785][675]LogWindows: Error: [Callstack] 0x00007ff78838060c UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction   
> [2025.03.03-18.53.14:785][675]LogWindows: Error: [Callstack] 0x00007ff788377a77 UnrealEditorFortnite-Win64-Shipping.exe!UnknownFunction

---

_[View the full topic](https://forums.unrealengine.com/t/ik-retargeter-causing-uefn-to-crash/2364753)._