On Thu, Mar 17, 2011 at 3:54 AM, <Bill.Venables at csiro.au> wrote: > It doesn't work (in R) because it is not written in R. It's written in some other language that looks a bit like R. It parses in R, so I would say it was written in R. To paraphrase Obi-wan, it's just not the R you are looking for.