CC5 fbx import crashes UE5.7.4

Summary

I’m using Reallusion Character Creator 5 to create a character and their CC/iC Auto Setup for UE (All-in-One) plugin to import character into UE 5.7.4.

The import crashes 7-8 out of 10 times with error.
How do I fix this ?

What type of bug are you experiencing?

Plugins

Steps to Reproduce

The directory generated by CC5 has these 4 files: character.fbx, charcater.json, textures (directory) and character.fbm.

I select character.fbx and textures director while importing. The settings are correct as far as I know because it works like 2 or 3 times out of 10. I tried 2 ways

  1. Closing UE and copying files to content directory, then opening UE and let auto import trigger and select options in import menu.
  2. Cancelling auto import and right clicking in my Characters directory in content browser and manually select character.fbx and textures directory.

Expected Result

Import successful

Observed Result

LoginId:8932cbc3693541c9bf0fdf76e277012a
EpicAccountId:be85f6de2fe347cd8880cf1c72bdb0b7

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 1095]
Array index out of bounds: -9472 into an array of size 0

UnrealEditor_Core
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_RLPlugin!UCCFbxFactory::FactoryCreateFile() [E:\Unreal Projects\Code\CCAutoScriptForUnreal\Auto Setup 2.02 For Unreal 5.7 (All-in-One)\Plugins\RLPlugin\HostProject\Plugins\RLPlugin\Source\RLPlugin\Private\CCFbxFactory.cpp:355]
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_Engine
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll

Platform

Unreal Engine 5.7.4
CC/iC Auto Setup for UE (All-in-One) plugin

Operating System

Windows 11 Home Single Language
Version: 25H2
OS Build: 26200.8655

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