请问在做gologit2时出现如下提示怎么办？gologit2 happ i.scpm slninc sedu emp lninc age edu health urban i.prov if female==1, npl(i.scpm edu)

factor-variable and time-series operators not allowed
r(101);

有没有大神可以解答下呀?哪里出现问题了？万分感谢！！