lme4 upgrade produces error message Error in `[[<-.data.frame`(`*tmp*`, i, value = integer(0))

Question

I have constructed a generalized mixed linear model with lmer (lme4) last week which worked fine:

fit<-lmer(dat$presence~log(dat$SIZE_strict)*dat$Troph_le         


        

Answer 1

This is a buglet in the new version of lme4 (to be fixed in an upcoming patch release) that requires grouping variables to be findable within the data frame specified by the data argument. In general things will work more smoothly (and your code will be easier to read) if you use the data argument and eschew using variables of the form dat$var, for example:

fit <- glmer(presence~log(SIZE_strict)*Troph_level+log(HAB500EXCL_strict+1)+
  (1|dataset), family=poisson, data=dat)