[R] Warning messages in lmer function (package lme4)

From: CENDOYA, Marķa Gabriela <gcendoya_at_balcarce.inta.gov.ar>
Date: Mon 13 Jun 2005 - 23:03:09 EST


Hi:

I'm using function lmer from package lme4, and I get this message:

" There were 12 warnings (use warnings() to see them)"

So I checked them:

Warnings 1 to 11 said:

  1. optim returned message ERROR: ABNORMAL_TERMINATION_IN_LNSRCH

 in: "LMEoptimize<-"(`*tmp*`, value = structure(list(maxIter = 50, ...

and Warning 12 said:

  1. IRLS iterations for glmm did not converge in: lmer(Enfermo ~ Bloque + Trat * Var * dia + (1 | IDfruto), data = desinf, ...

There was no error message in the call of lmer function, so:

What do these warnings mean?

Do these errors occur at earlier iterations but finally the model converges?

Can the model I got be trust?

Thanks, Gabriela.

PD: I'm using:

Windows XP ,

R 2.1.0,

Package lme4, version 0.95-6

And the fitted model was:

modelo1 <- lmer(Enfermo ~ Bloque+Trat*Var*dia+(1|IDfruto),

                 data=desinf,

subset=!desinf$dia==1&!desinf$Trat=="Sin_inoculo",
                 family=binomial)

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