Not really, unless something is showing up in the preview as white.  It's happened to me a few times.  It generally happens if you're rendering a complex scene (like I do), or ridiculously big (like I do) or have a lot of reflections (like I do), and Poser runs out of memory.

I suggest you break your scene into bits, render piecemeal and put it all back together in Photoshop.  

You should also shut down Poser and restart it before trying to render again.

Coppula eam se non posit acceptera jocularum.

My Store

My Gallery