M001 : Limited weightcount to 4 for nnn verts in Mesh sss

Your Mesh has vertices where the number of assigned Bone weightmaps exceeds the number of allowed weightmaps (4) SL supports up to 4 weightmaps per vertex. Avastar has fixed this for you by reducing the number of weights on affected vertices. Caution: This automatic fix may affect the visual shape in SL.

Note: Avastar has a Helper tool to find and fix vertices with too high weight count:
Limit Weight Count