Craig, what you are suggesting makes sense to me... and is consistent with what the bitcheck numbers are. I assume this byte-wise operation is quite evident in the MC code? Nice work. c. APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 57 in the apo35-dis archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-dis/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo35-dis@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO