[PyMOL] ray-tracing clip's off C-terminus

I am making C-alpha ribbon traces with two different sets of 
coordinates. Each time, when I type "ray" to render, the resulting 
image has the C-terminal C-alpha clipped off. The missing carbon is 
visible in the non-ray traced image, however. Please send suggestions 
to fix this asap.


***************************
Casey M. Finnerty, Ph. D.
Dept. of Microbiology
University of Guelph
Guelph, ON, Canada
N1G 2W1