You have either (a) some polygons with >4 faces or (b) a number of polygons with <3 faces.
In order to find them, use the Statistics panel (w key). If you have a number of degenerate (<3 sides) polys then the easiest way to get rid of them is to select them all in the statistics panel, then delete them. You might need to do a merge points afterwards just to tie up any loose ends.
If you have polygons with >4 points, you can either triple them (quick and dirty) or you can manually carve them up with the knife or split tools.
|