Crap. I just tried another render. This time I reduced the dimmension by a 1000 pixels and I reduced the reflection quality from 0.3 to 0.2(back to default). And the dang render still stops when there is only a lower 3 or 1/2 left to render . I've got a duo core. The processes  has been set to 4 as is suggested by various in the know sources. Plus I've got 3gig of memory and plenty hard disk space. I think I'll delete the Poser.ini(not permanently file to see if that does anything. It may just be that I am maxing out the available ram and its causing Poser to crap out.

Stewer is also using reflection maps if I recall. My render is pure reflections. But man the render times are long when also using IDL and hair room hair. Try 6 hours just for the the IDL calculations and then another 4 hours or so to render.

I don't think the resolution settings have been fixed. As I just rendered at 600pixel an inch and I still have got jaggies.