Yes.  This was a bug.  The latest version shouldn't have this bug anymore.
As Ron pointed out, the problem is when the system expects photons but none
were stored on the surfaces of objects.  I've added a variety of checks
for this, so it should be fixed.

-Nathan

Mark Wagner wrote:
> 
> When I render the following scene as a 512x384 image with the parameter +k
> of 0.54 or 0.86, or probably several other values, UVPOV 5.2 crashes with
> the error "UVPOV caused an invalid page fault in module UVPOV.EXE at
> 015f:00442445." while rendering line 147 of the image.  However, if any of
> the lines in the photons block in the global_settings is commented out, or
> if a value for +k less than 0.54 is used, this error does not occur.
>

Post a reply to this message