Hi, all. i am trying to get results using sas university v.94   in the study, I want to know effect of sadness to acting.   variables are sad: sadness(0,1) sadcb: between subject in sadness sadcw: withins subject in sadness timec: time   when i try this, i got the results.   proc glimmix data=work.import1; class id time; model acting(event="1") = sad_lag1 sadcb_lag1 timec / link=logit dist=binary ddf=95, 94, 95 solution cl; random intercept / subject=id type=un g solution cl; random time/ subject=id type=ar(1) residual; run;   but when i try this syntax   PROC GLIMMIX DATA=work.import1; CLASS id time; MODEL acting (EVENT="1")=sadcw sadcb timec/LINK=logit DIST=binary DDF=95, 94, 95 SOLUTION CL; RANDOM intercept/SUBJECT=id TYPE=un g SOLUTION CL; RANDOM time/SUBJECT=id TYPE=ar(1) RESIDUAL; run;   i got this warning. WARNING: Obtaining minimum variance quadratic unbiasedestimates as starting values for the covariance parameters failed. please help if you know about this problem. thank you   ... View more

Hi, all. i got an warning that  WARNING:  Obtaining minimum variance quadratic unbiased estimates as starting values for the covariance parameters failed.   In the study, I want to know whether feeling sad can predict level of act. and my sas is university edition, v94.     acting=level of act(0,1) sadcw=within subject variable(sad) sadcb=between subject variable (sad) timec=time   I could do this and got results.   proc glimmix data=data; class id time; model acting(event="1") = sad_lag1 sadcb_lag1 timec / link=logit dist=binary  DDF=95, 94, 95, 95 solution cl; random intercept / subject=id type=un g solution cl; random time/ subject=id type=ar(1) residual; run;   but got warning about this.   PROC GLIMMIX DATA=data; CLASS id time; MODEL acting (EVENT="1")=sadcw sadcb timec/LINK=logit DIST=binary DDF=95, 94, 95, 95 SOLUTION CL; RANDOM intercept/SUBJECT=id TYPE=un g SOLUTION CL; RANDOM time/SUBJECT=id TYPE=ar(1) RESIDUAL; run;   if someone know about this problem. please help me. also, i got something weird about variables. I got variables like, sadcb, sadcw, sad_lag1, sadcb_lag1 through sas. I think if i could not get data today, then there are no sadcb data. am i right? but there are sadcb data on sas outcome data(calculated). could it be a cause of the warning sign? sorry for my poor English and thank you for reading.       ... View more