Find Verts

Vertex Tools

You find the Vertex Tools in the Avastar Tools Panel in the Tool shelf.
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Doubles (Find Duplicates)

The Doubles Operator selects all vertices which are recognized as duplicates.[break] Note: this operator does not preserve the original vertex selection. So after the operator is called, only the duplicate vertices are selected or no vertex is selected when the mesh is clean (has no duplicates)
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Unweighted (Find Unweighted Vertices)

The Unweighted Operator selects all vertices which are not assigned to any Weight Group.[break] Note: this operator does not preserve the original vertex selection. So after the operator is called, only the unweighted vertices are selected or no vertex is selected when the mesh is clean (all vertices have weights)

Note: When you have selected multiple Objects you will find a report in the Blender Console with one line per object indicating the number of unweighted vertices.

Zero weights (weigthsum == 0)

The Zero weighted Operator selects all vertices for which the sum of all assigned weights is 0.0 (zero).[break] Note: this operator does not preserve the original vertex selection. So after the operator is called, only the zero weighted vertices are selected or no vertex is selected when the mesh is clean (all vertices have weightsums > 0)

Note: When you have selected multiple Objects you will find a report in the Blender Console with one line per object indicating the number of vertices with weight sums == 0

>4 Weights (too many Weights on Verts)

The >4 Operator selects all vertices for which the number of assigned weights is > 4.[break] Note: this operator does not preserve the original vertex selection. So after the operator is called, only the vertices with more than 4 weights are selected or no vertex is selected when the mesh is clean (all vertices have less than 5 weights assigned)Note: When you have selected multiple Objects you will find a report in the Blender Console with one line per object indicating the number of vertices with too many weights.