TITLE:A two-level second-stage moderated mediation
            path analytical model,w is level-2,x,m,y are level-1,
      DATA:
        FILE IS C:\Users\Administrator\Desktop\5.dat;
      VARIABLE:
        MISSING ARE ALL (-99);
        NAMES ARE x m w y cluster;
        USEVARIABLES ARE x m w y;
        WITHIN=x;
        BETWEEN=w;
        CLUSTER=cluster;
        DEFINE:CENTER w(GRANDMEAN);
        DEFINE:CENTER x(GROUPMEAN);
        ANALYSIS:TYPE=TWOLEVEL RANDOM;
        MODEL:
        %WITHIN%
        S | m on x;
        y on m(b);
                x;
        %BETWEEN%
        S on w(a1);
        [S] (a0);
        m on w;
        m with S;
        y with m;
        y with S;
        y with w;
        MODEL CONSTRAINT:
        NEW(ind_h ind_l);
        ind_h=(a0+a1*(0.85))*b;
        ind_l=(a0+a1*(-0.85))*b;
        NEW(diff);
        Diff=ind_h-ind_l;
        OUTPUT:SAMPSTAT;
        CINTERVAL;

*** ERROR
  One or more between-level variables have variation within a cluster for
  one or more clusters.  Check your data and format statement.

     Between    Cluster ID with variation in this variable
     Variable     (only one cluster ID will be listed)

      W          1
有谁知道这个怎么处理吗