Skeletal Mesh editor crashes when transferring weights

Development Character & Animation
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1

UE 5.6 when transferring weights in skeletal editor i sometimes get the below error. some SKMs work fine while others crash. does anyone have the same issue?
Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 1067]
Array index out of bounds: 19640 into an array of size 19640

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2

I have the exact same issue

3

You may need to simplify your mesh. Switch from the Skin tab to the Mesh tab, then select Simplify. This will reduce your vertice count while maintaining the original form of your mesh. Then go back to the Skin tab and follow your norma, procedure. This will prevent UE from crashing.

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4

Solved it by simplifying the mesh.