var_name = cmd.var
                  @get_macro_def
                  IF debug_w THEN print, '   macro_def in def_file_suff_var =', macro_def
                  CASE macro_def[1] OF
                     '=:': BEGIN
                        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, '\', '/')
                           'make_correlation': macro_base_fld =  extract_str(line, '\', '/')
                           'make_linfit': macro_base_fld =  extract_str(line, '\', '/')
                           'make_correldomain': macro_base_fld =  extract_str(line, '\', '/')
                           'make_thdepth': macro_base_fld = 'votemper'
                           'make_linfitdom': macro_base_fld =  extract_str(line, '\', '/')
                           ELSE: BEGIN 
                              print, ' Define macro in fld_macro.def'
                              print, ' macro_def[2] is ', macro_def[2]
                              stop
                           END 
                        ENDCASE
                     END 
                     ELSE: macro_base_fld = macro_def[1]
                  ENDCASE 
                  macro_base_fld_1 = (strsplit(macro_base_fld, ',', /EXTRACT))[0]