Opening Animation Sequence editor crashes UEFN

General Issues and Bug Reporting
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1

Summary

The crash happens when opening animation sequences made through “create linked Animation Sequence” and “bake animation sequence”. animation sequences made through metahuman performances seem to be unaffected.

This problem is also present in other projects, not just the one I’m working currently

Steps taken so far to resolve this issue. Updated Nvidia driver to the latest version and verified the uefn installation.

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Stability

Steps to Reproduce

Open an Animation Sequence through the content drawer results in a EXCEPTION_ACCESS_VIOLATION writing address 0x0000000000000118

Expected Result

Opens the Animation Sequence editor window.

Observed Result

EXCEPTION_ACCESS_VIOLATION writing address 0x0000000000000118 error message

Platform(s)

windows 11. 30

Island Code

5376-6856-3370

Video

Additional Notes

Here’s the full error message. i also have a log that i can provide

LoginId:b9f551cd4203b0c9c03d3ebca8f67754
EpicAccountId:ee80d21e97ab4a7fb2e11a5ef4b05cca

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION writing address 0x0000000000000118

ntdll
UnrealEditorFortnite_Win64_Shipping
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kernel32
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2

FORT-866008 has been created and its status is ‘Unconfirmed’. This is now in a queue to be reproduced and confirmed.

3

I have the same issue.
In our case it happens with animation sequences that have been retargeted to Fortnite skeleton using an IK Retargeter.

Original sequence opens fine, retargeted sequence crashes.

Additional notes:

  • Some of our sequences are quite old, and used to open fine a few months ago
  • These sequences load perfectly fine in-game (with PlayAnimationController)

Also on Windows 11.