Hi dears while modeling an interaction random effect in lmer i receive the instantaneous error message
> ldlM4<-lmer(ldl~rt*cd4+age+rf+pharmac+factor(hcv)+ + hivdur+(rt:cd4|id),na.action=na.omit,REML=F) *Warning message: In mer_finalize(ans) : false convergence (8) * I think the matter lies in syntax, 'cause i sistematically receive the same message even when changing response... PS: the above model runs quite well in lme and only rarely I recive : * Errore in lme.formula(fixed = ldl ~ rt + cd4 + age + rf + pharmac + factor(hcv) + : nlminb problem, convergence error code = 1 message = iteration limit reached without convergence (9) * ..reason for which I switch into lmer Thank u in advance foe any hints...;) -- *Little u can do against ignorance,....it will always disarm u: is the 2nd principle of thermodinamics made manifest, ...entropy in expansion.**....But setting order is the real quest 4 truth, ......and the mission of a (temporally) wise dude. * [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.