I encounter such problem with lmer under FreeBSD, but not under Windows. Anyone knows why? Thanks.
> example(lmer) lmer> (fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy)) Error in UseMethod("as.logical") : no applicable method for "as.logical" > traceback() 9: as.logical(EMverbose) 8: as.logical(EMverbose) 7: lmerControl() 6: do.call("lmerControl", control) 5: lmer(Reaction ~ Days + (Days | Subject), sleepstudy) 4: eval.with.vis(expr, envir, enclos) 3: eval.with.vis(ei, envir) 2: source(zfile, local, echo = echo, prompt.echo = paste(prompt.prefix, getOption("prompt"), sep = ""), continue.echo = paste(prompt.prefix, getOption("continue"), sep = ""), verbose = verbose, max.deparse.length = Inf, encoding = encoding, skip.echo = skips) 1: example(lmer) > > sessionInfo() R version 2.6.0 (2007-10-03) i386-portbld-freebsd6.3 locale: C attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] lme4_0.99875-9 Matrix_0.999375-2 lattice_0.16-5 loaded via a namespace (and not attached): [1] grid_2.6.0 rcompgen_0.1-15 tools_2.6.0 -- Ronggui Huang Department of Sociology, Fudan University, Shanghai, China Department of Public and Social Administration, CityU, HK ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.