> It now works through the calculation stage nicely. I get a partially > completed seqences printed into Analysis main window. > Then it tries to do next step and fails with this traceback: > > line 724, in updateSpinSystems > typesText = ' '.join(spinSystem.sstTypes) > TypeError: sequence item 0: expected string, NoneType found Update and try now. It is good to know that someone is trying this system out. :-) T. ------------------------------------------------------------------------------- Dr Tim Stevens Email: [log in to unmask] Department of Biochemistry [log in to unmask] University of Cambridge Phone: +44 1223 766022 (office) 80 Tennis Court Road +44 7816 338275 (mobile) Old Addenbrooke's Site +44 1223 364613 (home) Cambridge CB2 1GA WWWeb: http://www.bio.cam.ac.uk/~tjs23 United Kingdom http://www.pantonia.co.uk ------------------------------------------------------------------------------- ------ +NH3CH(CH(CH3)OH)C(O)NHCH(CH(CH3)CH2CH3)C(O)NHCH(CH2CH2SCH3)CO2- ------- -------------------------------------------------------------------------------