bob z. could somewhat (somewhat?) understand this error if he was *actually*
> sectioning something. bob z. just picked a plane and then hit the section
But Bob Z. _was_ actually sectioning something. Section view does actually a cut with surface. The cut may fail for a very famous reason - if the resulting body has zero-thickness geometry somewhere. This is quite a rare situation, indeed, but I believe you can find the point causing the problen. Usually this happens if the sectioning plane is tangent to a cylindral surface. However, I have seen a model which did not section even though the geometry was rather simple and the section plane was not tangent to any surface... In that case it was a kind of bug.
-h-