thanks, everyone. I was a bit confused. I now think that the "car" error was because the package on the cran website itself was built under 2.9.2, not because I had an old version lying around, which my package continued to use instead of a newer version that I would just have installed.
I was also ambiguous about asking about version. Sorry. I did not mean version number of R, but the bit version. the answer is that the two methods are sessionInfo() and bit64= ifelse(.Machine$sizeof.point == 8, T, F) . It would be nice if the standard R startup message would state whether the version is 64bit or 32bit, but this is just a suggestion. now, all I need is a more recent packaged R version than 2.9.0. can I ask who maintains http://r.research.att.com/ , so I send a short email to this person? regards, /iaw [[alternative HTML version deleted]] ______________________________________________ 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.