sorry I opened a previous R version. Here is my 64-bit R session - > .Machine$sizeof.pointer [1] 8 -- View this message in context: http://r.789695.n4.nabble.com/64-bit-R-on-64-bit-Windows-box-Still-not-enough-memory-tp2315742p2316970.html Sent from the R help mailing list archive at Nabble.com.