[R] help with tclVar

[solares@unsl.edu.ar]

Hi, I can' t load a variable tcltk declared with tclVar, why is this?, the
exmple above explain me ,Thanks Ruben
a<-tclVar(init="")
> f<-function(){
+ a<<-"pipo"
+ }
> f()
> a
[1] "pipo"
> tclvalue(a)
Error in structure(.External("dotTcl", ..., PACKAGE = "tcltk"), class =
"tclObj") :
        [tcl] can't read "pipo": no such variable.
>