Hi Eric, Could you please reply to this directly so that I have your email address? Couldn't find the "direct mail address." We are having some weird problems with reopening the .py session files. Can't really put a finger on it, but every once in a while a .py file gets written and it cannot be opened by Chimera. Not all the time, mostly it is ok, but it can be really annoying when it happens. We are running (mostly) Windows although also some Linux boxes. I can't really remember this happening on Linux. Thanks for any comments. Bill -- William B. Gleason, University of Minnesota Associate Professor, Department of Laboratory Medicine & Pathology Fellow, University of Minnesota Supercomputer Institute Graduate Faculty: Chemistry, Medicinal Chemistry, and Biomedical Engineering (612) 626-2455 (office) (612) 626-5115 (lab) www.umn.edu/~bgleason