The Boundary method for surfaces will allow you to plot the free or non-manifold edges for a list of specified surfaces or solid faces. A free edge is any edge that is not shared by at least one other surface or solid face. A non-manifold edge is shared by more than two surfaces or solid faces. Non-manifold often indicates a geometry which is not manufacturable; it may be alright for surface models or on shared solid faces, but is illegal in a B-rep solid.This method is recommended for verifying cracks in the model, or more specifically in a surface set to be used in creating a B-rep solid.

The B-rep method for surfaces will allow you to plot the free or non-manifold edges for a list of specified surfaces or solid faces. A free edge is any edge that is not shared by at least one other surface or solid face. A non-manifold edge is shared by more than two surfaces or solid faces. Non-manifold often indicates a geometry which is not manufacturable; it may be alright for surface models or on shared solid faces, but is illegal in a B-rep solid.This method is recommended for verifying cracks in the model, or more specifically in a surface set to be used in creating a B-rep solid.

The Update Graphics subordinate form is displayed when the Update Graphics button is pressed on the Verify/Surface/Boundaries form. This subordinate form allows you to erase or plot in the current viewport, groups of congruent or incongruent surfaces.

This form is useful for checking for surface cracks, topologically incongruent surfaces, or non-manifold edges shared by more than two surfaces. MSC.Software Corporation suggests you use either the Edit/Surface/Edge Match form (see Matching Surface Edges) or the Create/Surface/Match form (see Matching Adjacent Surfaces) to correct any incongruent surfaces that have a gap between them.

Surfaces in the entire model are checked for being duplicate.