var_name = cmd.var
                  @get_macro_def
                  IF debug_w THEN print, '   macro_def in def_file_suff_var =', macro_def
                  CASE macro_def[2] OF
                     'make_stddev': macro_base_fld =  extract_str(line, '\', '/')
                     'make_grad' : macro_base_fld =  extract_str(line, '\', '/')
                     'make_ratio' : macro_base_fld =  extract_str(line, '\', '/')
                     'make_interp' : macro_base_fld =  extract_str(line, '\', '/')     
                     'make_skewness': macro_base_fld =  extract_str(line, '\', '/')
                     ELSE: BEGIN 
                        print, ' Define macro in fld_macro.def'
                        stop
                     END 
                  ENDCASE