proc glimmix data=chicken;
class date id treatment;
model registered (event='1') = treatment|factor1 |factor 2 / link=logit dist=binomial solution;
random intercept/ subject=id(treatment);
random date/subject= ID(treatment) residual;
|G-side Cov. Parameters||1|
|R-side Cov. Parameters||1|
|Columns in X||28|
|Columns in Z per Subject||1|
|Subjects (Blocks in V)||485|
|Max Obs per Subject||26|
model registered (event='1') = treatment factor1 factor 2 id date / link=logit dist=binomial solution; sas gives the following indication:
WARNING: Obtaining minimum variance quadratic unbiased estimates as starting values for the covariance parameters failed.
If i exclude date from the statement the model will not converge. When excluding id from the model, the model converges however as date takes all the credit for effect per day factor1 and factor 2 are not provided with further output.