UE5.6 Crash on import

Pipeline Unreal Engine
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1

Hi, I’ve been importing characters fine into UE5.6 and have used both Live link and simply dragging in the character into UE5 with no problem but now all I get is the following crash:

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 1067] Array index out of bounds: 1 into an array of size 1.

I follow the correct import settings. It doesn’t work with a plain character with or animation. I have deleted the UE5 cache and have looked at various forums with regards to the above error.

I even recreated my character and I still get the crash. Could someone please help me understand why this has only just now started to happen? Thanks

2

Hi theLight,

Regarding deleting the UE5 cache, could you please try deleting the caches listed above?

  • C:\Users{User Name}\AppData\Local\UnrealEngine\5.6\DerivedDataCache
  • C:\Users{User Name}\AppData\Local\UnrealEngine\Common\DerivedDataCache
  • C:\Program Files\Epic Games\UE_5.6\Engine\DerivedDataCache
    After removing them, try opening again or recreated the file to see if it helps.