I have a problem with displaying addaccu.cif, at the end of the tutorial example of addaccu, using Dreal. When I issue the command 'dreal -l addaccu', I get the main window and two other windows for arrows and zoom, and nothing happens. After I have tried to open addaccu.cif from the file menu, for the second time, I get the message: 'cif109: Layer unknown, line 11'. Line 11 of addaccu.cif reads: 'LCNW;' Could you suggest how this situation is to be handled? Dreal did display another file addaccu_rng.cif. Also, where can I find documentation for all the tools in the suite? Regards, Chitta