[R] Ryacas: problem with "Sym"

[Gavin Steininger]

I have been trying to get the Ryacas package to work without any 
success. I do not seem to be able to the "Sym" function work, for 
example:

> library(XML)
> library(Ryacas)
> a=Sym("a")
> a
Error in summary.connection(x) : invalid connection

I am windows XP  with R 2.10 

Thanks for you help

gavin amw steininger