Packaged Builds with Mutable Plugin are Crashing

Development Platform & Builds Debugging, Optimization, & Profiling
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1

Hi, I have a small project with a character editor based on the new mutable plugin. In editor everything works fine, but any packaged build crashes as soon as I load a pawn that uses a customized object instances.

In a build with debug settings I get following error message:

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 783] 
Array index out of bounds: 593 into an array of size 105


0x00007ff78c929d02 MyGame-Win64-DebugGame.exe!UCustomizableInstancePrivate::BuildOrCopyClothingData() []
0x00007ff78c95cf80 MyGame-Win64-DebugGame.exe!UCustomizableInstancePrivate::UpdateSkeletalMesh_PostBeginUpdate0() []
0x00007ff78c9a7d21 MyGame-Win64-DebugGame.exe!impl::Task_Game_ConvertResources() []
0x00007ff78c9798a7 MyGame-Win64-DebugGame.exe!UCustomizableObjectSystem::AdvanceCurrentOperation() []
0x00007ff78c9b2498 MyGame-Win64-DebugGame.exe!UCustomizableObjectSystem::TickInternal() []
0x00007ff78adb4321 MyGame-Win64-DebugGame.exe!FStreamingManagerCollection::UpdateResourceStreaming() []
0x00007ff78adadde9 MyGame-Win64-DebugGame.exe!FStreamingManagerCollection::Tick() []
0x00007ff78afc7769 MyGame-Win64-DebugGame.exe!UGameEngine::Tick() []
0x00007ff78c1e3b05 MyGame-Win64-DebugGame.exe!FEngineLoop::Tick() []
0x00007ff78c1f43ec MyGame-Win64-DebugGame.exe!GuardedMain() []
0x00007ff78c1f44ba MyGame-Win64-DebugGame.exe!GuardedMainWrapper() []
0x00007ff78c1f71b2 MyGame-Win64-DebugGame.exe!LaunchWindowsStartup() []
0x00007ff78c2040d4 MyGame-Win64-DebugGame.exe!WinMain() []
0x00007ff79127b43a MyGame-Win64-DebugGame.exe!__scrt_common_main_seh() [D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
0x00007ffe9dd1e8d7 KERNEL32.DLL!UnknownFunction

I get the error after I start the game with the .exe file from the packaged build. The error appears asap a character with mutable configuration is spawned. It appears only on packaged builds. Editor works fine.

Any ideas how to solve it?

2

Update: The builds are working if I remove any cloth compiler options. But with enable clothing checked in compiler options of the customizable object, the error message returns.

3

I am also getting this issue. Only happens in packaged builds. Must be a bug.