proc genmod data=h.m0815z151 desc;
class  id xb age_g group paymode_y/ref=first;  
model anti_v=xb age_g paymode_y  group / dist=bin ;
repeated subject=id/type=exch covb corrw;
run;


日志出现提示：Class levels for some variables were not printed due to excessive size.  意思是数据量太大，有一个变量无法设置哑变量，好郁闷

三个变量可以，但是多一个变量就不行了，求大神指导