I noticed something in R --help that needs updating for R 2.1.0 In the changes documentation for R 2.1.0: o BATCH on Unix no longer sets --gui="none" as the X11 module is only loaded if needed. But --gui=none is still documented as acceptable in R --help [39]% R --version R 2.1.0 (2005-04-18). Copyright (C) 2005 R Development Core Team [40]% R --help [ output omitted, until] -g, --gui=TYPE Use TYPE as GUI; possible values are 'X11' (default), 'none', 'Tk' and 'gnome' but, [41]% R --gui=none ERROR: unknown GUI none -Don -- -------------------------------------- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA