Sketchup Round Corner [top] Crack Top -

: If holes appear, you can often "heal" them by redrawing a single missing edge with the . SketchUp will usually re-generate the missing face. Check Hidden Geometry View > Hidden Geometry

The designer had previously drawn a center guide line across the top face (to align leg holes). That guide line was a hidden, un-deleted edge. The Round Corner tried to round across that internal edge, creating a crack. sketchup round corner crack top

To never see the "SketchUp round corner crack top" again, you must change your workflow. : If holes appear, you can often "heal"