先define了一个format，然后在sql中一直返回error说character format $range in PUT function requires a character argument.
求问问题在哪，应该怎么修改呢，感恩！

format:
17   proc format library=Project;
18   value $ range
19   810-high = '810+'
20   790-809 = '790-809'
21   770-789 = '770-789'
22   750-769 = '750-769'
23   730-749 = '730-749'
24   710-729 = '710-729'
25   690-709 = '690-709'
26   670-689 = '670-689'
27   650-669 = '650-669'
28   630-649 = '630-649'
29   low-629 = '<630'
30   other = 'Null or Zero';
31   run;



32   OPTIONS FMTSEARCH=(Project);
33   run;
34
35   proc sql;
36   create table project.n1 as
37   select score,
42   put(Score,$range.) as range
43   from
44   project.student
error: character format $range in PUT function requires a character argument.put不是num转char的function吗, 哪里需要character argument呢？还是我定义的format有问题，求解。