I have Chimera beta version 1 build 2186. I think it's the latest beta available. I'm trying to clean up some structures to run in Dock. When I do a google search, the following page comes up: http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/dockprep/dockprep.h... I can't find Dockprep under the Surface/Binding Analysis menu. Is this something that will come out in future versions but the web page is already built? Or is it in later versions? If so which? My particular situation makes it hard to get to SYBYL to assign charges and define rigid and anchor sets. I was thrilled to see that something like Dockprep has at least been concieved of. Also, when I try to save as mol2, I get the following error: "Import Error: No module named WriteMol2." I apologize ahead of time if this marks me as a hopeless novice. Any help would be much appreciated. Steve "Sometimes, life hits you in the head with a brick." Steve Jobs ---------------------------------------------------------------- Steve Finckbeiner 132 Grace Cancer Drug Center Roswell Park Cancer Institute Elm and Carlton Streets Buffalo, NY 14263-0001 (716)845-5818 --------------------------------- Yahoo! Mail - Helps protect you from nasty viruses.