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Lightmass crash: "Static mesh element count did not match mesh instance count!"

This error seems to have popped up out of nowhere (was running fine, then suddenly not) when attempting to build my lighting.

=== Lightmass crashed === Assertion failed: StaticMesh->GetLOD(GetMeshLODIndex()).NumElements == MaterialElements.Num() [File:D:\Build\++UE4\Sync\Engine\Source\Programs\UnrealLightmass\Private\Lighting\StaticMesh.cpp] [Line: 277] Static mesh element count did not match mesh instance count!

Running a geometry build doesn't reveal any errors.

I can't seem to figure out what the heck is causing it... any ideas on what it's talking about, and how I might go about fixing it?

Thanks!

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Product Version: UE 4.20
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asked Dec 04 '18 at 12:26 AM in Rendering

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brittnell
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Solution was found here, under a different but similar error.

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answered Dec 04 '18 at 01:57 AM

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brittnell
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