On 25/11/12 11:53, Qixu Cai wrote: > Dear Paul, > > Thanks for your reply. > > Because I have some code in ~/.coot related to the graphic, when I ran > coot in "--no-graphic" mode, coot would crash. "fail with an error message" I hope you mean. > If I delete the ~/.coot file, coot will be ok at "no-graphic" mode. Yes, that can happen if you do not protect gui code. > > Another question: > > Many functions in coot, such as "refine-zone" or "refine-auto-range", > have a parameter called "altconf", which is a string, but what's the > meaning and function of "altconf"? Does it mean "alternative > conformation"? Yes. > And what kind of string will be used as correct argument in these > functions? > > "", "A" or "B", typically. Paul.