TIDSortedElemSet emptySet, avoidSet;
avoidSet.insert( firstQuad );
firstQuad = SMESH_MeshEditor::FindFaceInSet( n1down, n2down, emptySet, avoidSet);
TIDSortedElemSet emptySet, avoidSet;
avoidSet.insert( firstQuad );
firstQuad = SMESH_MeshEditor::FindFaceInSet( n1down, n2down, emptySet, avoidSet);