一、安装oparallel后运行结果是：full model cannot be estimated due to perfect prediction
二、使用findit spost9，安装后使用brant, detail 结果是：not all independent variables can be retained in all binary logits brant test cannot be computed。查了资料把自变量中不是二分类的去掉后，brant结果还是：not all independent variables can be retained in all binary logits brant test cannot be computed。
请教大家是哪里出了问题，后面怎么解决呢