Follow-up Comment #6, bug #23186 (project relax): I would suggest the following (which would require a lot of testing and checking, as it may kill the R2eff model): $ svn diff specific_analyses/relax_disp/api.py Index: specific_analyses/relax_disp/api.py =================================================================== --- specific_analyses/relax_disp/api.py (revision 27163) +++ specific_analyses/relax_disp/api.py (working copy) @@ -1485,8 +1485,10 @@ # Convert the parameter index. if model_param: param_name, si, mi = param_index_to_param_info(index=index, spins=spins) - if not param_name in ['r2eff', 'i0']: + if param_name in ['r2eff', 'i0']: si = 0 + elif si == None: + si = 0 else: param_name = aux_params[index - total_param_num] si = 0 _______________________________________________________ Reply to this item at: <http://gna.org/bugs/?23186> _______________________________________________ Message sent via/by Gna! http://gna.org/