mplus 已经定义了cluster，依旧显示错误，为什么呢?
data:file is C:\Users\Administrator\Desktop\新建文件夹\调节 个体1.dat;
  VARIABLE: NAMES ARE Num A AA B BA C D DD cluster;
  USEVARIABLES ARE A AA B BA C DD cluster;
  centering is grandmean(DD);
  centering is groupmean(A AA B BA)
  CLUSTER=cluster;