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..."as.logical" So I thought I'd upgrade lme4 to the latest version, but unfortunately the compilation fails - perhaps there's a missing #include: R CMD INSTALL -l ~/usr/lib/R lme4_0.99875-8.tar.gz * Installing *source* package 'lme4' ... ** libs gcc -std=gnu99 -I/home/dreitter/usr/lib/R/include -I/home/dreitter/ usr/lib/R/include -I/usr/local/include -I"/home/dreitter/usr/lib/R/ library/Matrix/include" -fpic -g -O2 -c glmer.c -o glmer.o glmer.c: In function ???internal_Gaussian_deviance???: glmer.c:185: error: ???CHM_SP??? undeclared (first use in this fu...

I've got a problem with "mcmcsamp" used with glmer objects produced with "lmer" from the lme4 package. When calling mcmcsamp, I get the error Error in if (var(y) == 0) { : missing value where TRUE/FALSE needed This does not occur with all models, but I can't find anything wrong with the dataset. If the error is in my data, can someone tell me what I am looking