Unreal Engine 5.1 Crash Bug Report Array index out of bounds: 111 from an array of size 106

Hello everyone when I do import with unreal engine 5 rig selected the engine Crash

This only happened with version 5.1

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 763]
Array index out of bounds: 111 from an array of size 106

0x00007ff9b95fe02c UnrealEditor-Engine.dll!UnknownFunction []
0x00007ff9b9605063 UnrealEditor-Engine.dll!UnknownFunction []
0x00007ff9b9604a77 UnrealEditor-Engine.dll!UnknownFunction []
0x00007ff9b5ae41e3 UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff9b59c326b UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff9b59dc2e2 UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff9a69da018 UnrealEditor-AssetTools.dll!UnknownFunction []
0x00007ff9a69d5ee4 UnrealEditor-AssetTools.dll!UnknownFunction []
0x00007ff9a69db0d7 UnrealEditor-AssetTools.dll!UnknownFunction []
0x00007ff9a69daa08 UnrealEditor-AssetTools.dll!UnknownFunction []
0x00007ff98c9faffc UnrealEditor-ContentBrowserAssetDataSource.dll!UnknownFunction []
0x00007ff98c9d474a UnrealEditor-ContentBrowserAssetDataSource.dll!UnknownFunction []
0x00007ff98c9d497b UnrealEditor-ContentBrowserAssetDataSource.dll!UnknownFunction []
0x00007ff98c97439f UnrealEditor-ContentBrowserAssetDataSource.dll!UnknownFunction []
0x00007ff98c9d4091 UnrealEditor-ContentBrowserAssetDataSource.dll!UnknownFunction []
0x00007ff9b7d51260 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9b7d55460 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9b7d297c4 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9b7dd05f6 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9b7df6793 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9b7d56e8c UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9b7b8a3e8 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9b7b6ffca UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9b7bd6743 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9b7bc5223 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9b7bbaecc UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff9d35319a2 UnrealEditor-ApplicationCore.dll!UnknownFunction []
0x00007ff9d35167d1 UnrealEditor-ApplicationCore.dll!UnknownFunction []
0x00007ff9d3534391 UnrealEditor-ApplicationCore.dll!UnknownFunction []
0x00007ff9d350ff93 UnrealEditor-ApplicationCore.dll!UnknownFunction []
0x00007ffa6b38e858 USER32.dll!UnknownFunction []
0x00007ffa6b38e299 USER32.dll!UnknownFunction []
0x00007ff9d3535849 UnrealEditor-ApplicationCore.dll!UnknownFunction []
0x00007ff69d357332 UnrealEditor.exe!UnknownFunction []
0x00007ff69d37287d UnrealEditor.exe!UnknownFunction []
0x00007ff69d37296a UnrealEditor.exe!UnknownFunction []
0x00007ff69d375680 UnrealEditor.exe!UnknownFunction []
0x00007ff69d3871b4 UnrealEditor.exe!UnknownFunction []
0x00007ff69d38a516 UnrealEditor.exe!UnknownFunction []
0x00007ffa6b7c74b4 KERNEL32.DLL!UnknownFunction []
0x00007ffa6bf626a1 ntdll.dll!UnknownFunction []

3 Likes

Having the exact same problem, hopefully someone can help with this.
Are you also using Auto Rig Pro?

1 Like

No, I use Magic Bone UE5 Rig Creator.

Same here! Hoping for a solution!

Getting this exact same crash. Fresh project, trying to import a Manny skeleton with new bones does this, even if its just 1 bone

trying to apply metahuman to third person skeleton

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 763] Array index out of bounds: 111 from an array of size 106

UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_AssetTools
UnrealEditor_AssetTools
UnrealEditor_AssetTools
UnrealEditor_AssetTools
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
user32
user32
UnrealEditor_ApplicationCore
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll

Hey,

I am getting the exactly the same error,
“Array index out of bounds: 111 from an array of size 106”

Did anyone find a solution to this?, as its critical to my work and little worried this is bug.

Same here, I am also experiencing the same error message/issue, and my unreal engine crashes right after.

Anybody knows if this is fixed in 5.1.1?

Same problem. No solution so far.

I just upgraded and I’m still crashing. Anyone know what is causing it?

Not sure if it’s the same problem, but looks similar:

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 763] Array index out of bounds: 0 from an array of size 0

UnrealEditor_OpenXRHMD
UnrealEditor_HeadMountedDisplay
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll

Same kind of problem here:
LogWindows: Error: Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h]

Still no news about how to correct this? The project couldn’t build under 5.0.3, and same here after migrating it to 5.1.1

1 Like

I’m getting the same issue on a recently upgraded project too. Trying to figure out the issues.

1 Like

I managed to fix mine. Had some C++ code using an array. It was accessing something before it had been created. Hope it helps!

2 Likes

How long do we have to wait for this bug to be fixed?

I have ran into this a couple times, and my fix has been to remove the blend profile FastFeet and weight blend profiles that are on the mannequin skeleton. There is not a clean handling of bones beening added but not represented in this profile on skel mesh import. These profiles are used in ABP nodes in certain cases for blending. It is a nice feature but needs a bug fix for bone additions.

It is also my understanding that this is now fixed in 5.1.1

Hope this helps.

Similar error ,no c++ and doing no anim work at all. Was however, using modeling mode.

HM

Hello, Right click on my static model that I repeat the most in the scene and select Nanite and mark, then compile only lights and the error went away, I hope it works for you.

me too exact same error -im using VR and animation, seems to happen if i take off and put on the HMD a few times