Crash on level open-- error not googleable

Filmattic
Fri, 11 Nov 2022 01:06:00 +0000
World Creation

I’ve been working on an animation for a couple weeks now, and suddenly I can’t open the level its based in anymore… which is infuriating because its going great otherwise and I’m very near the finish line. I feel like this level just has an incurable disease. Consistently getting:

Assertion failed: NewMP.Mass > (1.e-8f) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Experimental\Chaos\Private\Chaos\MassProperties.cpp] [Line: 212]

The level itself involves nested iterations of the same blueprint actor, which houses tons of geometry I’m looping through. The blueprint actor still opens up just fine in the blueprint editor and can drop in new levels easily, and with MORE instances than the cursed level, so it doesn’t appear to be a VRAM issue or a level size/complexity concern. (on an RTX 3090, my hardware tools were showing only 16gb vram occupied when the crashes began, and I’ve pushed it to 22GB vram on more complex animations).

I’ve tried googling this, I’ve tried reinstalling the engine, trashing all temp files, restoring from autosaves of the level before this started happening, creating an entirely new project and re-importing the level and blueprints connected to this… at my wit’s end here.

Has anyone encountered an issue with this directory/file? I’m not a dev so much as an animator, so please speak layman lol.

Current troubleshooting step is attempting to delete anything that could be ‘experimental’ or ‘chaotic.’ IE some niagra systems i’ve got in the cursed level.

Desperate for some help on this. Thank you! Below is the full summary on crash:

Assertion failed: NewMP.Mass > (1.e-8f) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Experimental\Chaos\Private\Chaos\MassProperties.cpp] [Line: 212]

UnrealEditor_Chaos
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_AssetTools
UnrealEditor_UnrealEd
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UnrealEditor_ContentBrowserAssetDataSource
UnrealEditor_ContentBrowserAssetDataSource
UnrealEditor_ContentBrowserAssetDataSource
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_Slate
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user32
user32
UnrealEditor_ApplicationCore
UnrealEditor
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UnrealEditor
UnrealEditor
kernel32
ntdll

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