This is the default refmac version, it is presumed to be in the path. It can be overridden using a re-definition either at the scripting interface or in one's ~/.coot file. E.g.: (define refmac-exec "/y/programs/xtal/refmac-latest/bin/refmac5-3-dec-2004")
Set this to a list of parameter strings:
If refmac-extra-params is a list of strings, it is used in preference to the "refmac-extra-params" file (should it exist). e.g. (set! refmac-extra-params (list "WEIGHT 0.2" "NCYC 10" "REFI BREF ISO" "REFI METH CGMAT" "REFI TYPE REST RESO 20 1.64"))
Return #t if the list of strings params-list contains a string beginning with "WEIGHT". If not return #f