Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 771] Array index out of bounds: 0 from an array of size 0

Development Programming & Scripting
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1

Has this been fixed? I finally downloaded AGIS from marketplace did all the setups to my current project: Retargeting ABP, Adding Interfaces, Components and etc. Everything runs smoothly while setting up and testing but as soon as I close and open it up again it crashes with this report.

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 771]
Array index out of bounds: 0 from an array of size 0

0x00007ffd5a33c175 UnrealEditor-Engine.dll!UnknownFunction
0x00007ffd5a3aba96 UnrealEditor-Engine.dll!UnknownFunction
0x00007ffd5a01101a UnrealEditor-Engine.dll!UnknownFunction
0x00007ffd821ea7d6 UnrealEditor-AnimGraphRuntime.dll!UnknownFunction
0x00007ffd9fcaa2d9 UnrealEditor-AnimGraph.dll!UnknownFunction
0x00007ffd9fb51072 UnrealEditor-AnimGraph.dll!UnknownFunction
0x00007ffd9fb51a11 UnrealEditor-AnimGraph.dll!UnknownFunction
0x00007ffd9fb50948 UnrealEditor-AnimGraph.dll!UnknownFunction
0x00007ffd9fb4e599 UnrealEditor-AnimGraph.dll!UnknownFunction
0x00007ffd848dae02 UnrealEditor-KismetCompiler.dll!UnknownFunction
0x00007ffd848df281 UnrealEditor-KismetCompiler.dll!UnknownFunction
0x00007ffd848d1f0a UnrealEditor-KismetCompiler.dll!UnknownFunction
0x00007ffd926cc4a4 UnrealEditor-Kismet.dll!UnknownFunction
0x00007ffd926c9403 UnrealEditor-Kismet.dll!UnknownFunction
0x00007ffdbfa61e30 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd28dd2 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd4f672 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd26a1d UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd4f672 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd274a0 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd2935b UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd5048e UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbff7d3f5 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd1b22e UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd8218b UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7ffd0 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd8228e UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7ffd0 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7fc34 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd311b6 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd6839f UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7bb9c UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd2b20b UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd4ae69 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbff7d08d UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd1b22e UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd8218b UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7ffd0 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd8228e UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7ffd0 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7fc34 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd311b6 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd6839f UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7bb9c UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd2b20b UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd4ae69 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbff7d08d UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd1b22e UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd8218b UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7ffd0 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd8228e UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7ffd0 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7fc34 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd311b6 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd6839f UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7bb9c UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd2b20b UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd4ae69 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbff7d08d UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd1b22e UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd8218b UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7ffd0 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd8228e UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7ffd0 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7fc34 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd311b6 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd6839f UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd7bb9c UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd2b20b UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbfd4ae69 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbff7d08d UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbff7b918 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffdbff7beb6 UnrealEditor-CoreUObject.dll!UnknownFunction
0x00007ffd5516b8f2 UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007ffd55156adf UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007ffd5513f2cf UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007ffdb1b047a6 UnrealEditor-Core.dll!UnknownFunction
0x00007ffd5c01ee5b UnrealEditor-Engine.dll!UnknownFunction
0x00007ffd55ce2250 UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007ffd5553fcc0 UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007ffd5553f461 UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007ffd55d267ee UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007ffd55cde6f3 UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007ff6dee0d138 UnrealEditor.exe!UnknownFunction
0x00007ff6dee0d37a UnrealEditor.exe!UnknownFunction
0x00007ff6dee10854 UnrealEditor.exe!UnknownFunction
0x00007ff6dee26984 UnrealEditor.exe!UnknownFunction
0x00007ff6dee29d7a UnrealEditor.exe!UnknownFunction
0x00007ffe25a0257d KERNEL32.DLL!UnknownFunction

I’ve been saving up a lot ($103FJD) just to get this Asset and now I can’t even use it after setting up. But when I remove the AGIS files I’ve migrated the project works. It’s bloody heartbreaking.

2

I am getting similar error as well and crashes each time, very annoying and couldn’t find any information how to fix this.
Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:C:\Program Files\Epic Games\UE_5.4\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 758]

3

I got a similar error when using the new retarget animation feature in UE 5.4.
I found that if there is an array in the “animation track names” of the source anim sequence, and the array length is >= target skeleton bones, this crash will occur. Adding virtual bones to the target skeleton before retargeting allows us to bypass this issue.
It’s important to note that the number of virtual bones added depends on the difference in quantity. For example, if the length exceeds the target skeleton by 5, then at least 5 virtual bones need to be added to the target skeleton.The hierarchy of the virtual bones are not important; they can be added to the root or any bones.
Remember to save and restart UE after adding virtual bones to ensure the new bones take effect before retargeting.