[R] GLMM: MEEM error due to dichotomous variables

Elva Robinson elva_robinson at hotmail.com
Tue Aug 7 15:31:30 CEST 2007

I am trying to run a GLMM on some binomial data. My fixed factors include 2 
dichotomous variables, day, and distance. When I run the model:


I get the error:

iteration 1
Error in MEEM(object, conLin, control$niterEM) :
        Singularity in backsolve at level 0, block 1

>From looking at previous help topics,( 
I gather this is because of the dichotomous predictor variables - what 
approach should I take to avoid this problem?

Thanks, Elva.

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