I read a post a while back, but can't find it now, about trouble with parts having sweep and loft features not displaying properly in section/detail views. We went through this yesterday, lost a BUNCH of time, but when the drafter selected the check box to "display surface features" in the view dialog, presto!! the part displayed fine. We re-did the view a couple times and with the box unchecked, the part WOULD NOT display, and with the box checked, it displayed every time. The part is very large, 4+Mb, and is a casting, so it's mostly lofts and sweeps. A little success goes a long way, especially when the project is all but done!!