Ok. I am rendering a still image at 640 x 480 res. The render is high quality/Contrast sensitive Production/Multi Pixel Filter (Triangle), with Ray Tracing ON. The image gets done render half way and quites? What is wrong with this picture and how can I correct this to see my renders.

I am running Maya 4.0 on a 2.4 GHZ with 80 gig HD and 1 gig Ram.