我的程序如下：
Proc sort data=data;by Stkcd;run;
proc panel data=data;
        id stkcd;
       model ROA =IR/ fixtwo;
Run;

为什么竟然报了下面这个错：“ERROR 22-322: Expecting a name.”。 我不知道它说的是什么name，我的变量名都是没问题的，请指教。

886
887   Proc sort data=data;by Stkcd;run;

NOTE: There were 1611 observations read from the data set WORK.DATA.
NOTE: The data set WORK.DATA has 1611 observations and 126 variables.
NOTE: PROCEDURE SORT used (Total process time):
      real time           0.01 seconds
      cpu time            0.01 seconds


888   proc panel data=data;
889         id stkcd;
                    -
                    22
ERROR 22-322: Expecting a name.
890         model ROA =IR/ fixtwo;
ERROR: Variable NAME not found.
891   Run;

NOTE: The SAS System stopped processing this step because of errors.
NOTE: PROCEDURE PANEL used (Total process time):
      real time           0.00 seconds
      cpu time