Greetings, Could someone give me some help on how to solve problems with packages? This worked just yesterday. Today I get an error. ? > library(Rcmdr) Error in structure(.External("dotTclObjv", objv, PACKAGE = "tcltk"), class = "tclObj") : [tcl] invalid command name "font". Error : .onAttach failed in 'attachNamespace' Error: package/namespace load failed for 'Rcmdr' Here's my system: > str(.Platform) List of 8 $ OS.type : chr "unix" ## OS X 10.5.6, R version 2.8.1 $ file.sep : chr "/" $ dynlib.ext: chr ".so" $ GUI : chr "AQUA" $ endian : chr "little" $ pkgType : chr "mac.binary" $ path.sep : chr ":" $ r_arch : chr "i386"