TITLE: This is an example of a bifactor Model
DATA: FILE IS ses.dat;
VARIABLE: NAMES = y1-y10;
          USEVARIABLE = y1-y10;
ANALYSIS: ESTIMATOR = MLM;
MODEL: NEG by y3* y5 y8 y9 y10;
       pos by y1* y2 y4 y6; y7;
       ses by y1* y2-y10;
       pos with neg @ 0;
       pos with ses @ 0;
       neg with ses @ 0;
       SES @ 1;
       neg @ 1;
       SES @ 1;
OUTPUT: STANDARDIZED MODINDICES;
总是说模型不收敛，哪里出错了呢，求助