Dear all, I have recently faced a problem where lme4 seems to be broken on R version 3.0.2 for 64 bits. I run a model which was always OK, and I get this message:



m1.4.1 <- glmer(value ~ 1  + Specialist  + Qualification + Experience + (1 | Writer) + (1  + Gender | Rule), writers.long , binomial, verbose = TRUE) Warning in rankMatrix(X) : rankMatrix(<large sparse Matrix>, method = 'tolNorm2') coerces to dense matrix. Probably should rather use  method = 'qrLINPACK' !?
 
Has anyone seen this message before? Has anyone noticed lme4 behaving strangely these days after an update. I also get messages regarding Cholemsky function and not enough memory, on models which used to run very happily. Any help will be appreciated.


Dr. Iasonas Lamprianou
Department of Social and Political Sciences
University of Cyprus



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