[R] Problems with CRAN package Ryacas

[Kjetil Halvorsen]

First:
> sessionInfo()
R version 2.15.0 (2012-03-30)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
 [7] LC_PAPER=C                 LC_NAME=C
 [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] Ryacas_0.2-11 XML_3.9-4     pnmath_0.0-3  MASS_7.3-17

loaded via a namespace (and not attached):
[1] compiler_2.15.0 fortunes_1.5-0  tools_2.15.0
>
Operating system is debian (wheezy+some sid)

I have installed yacas version 1.3.1 via synaptic.

Then:

library(Ryacas)
> yacas(expression(Factor(x^2-1)))     # copied from yacas help page
[1] "Starting Yacas!"
Accepting requests from port 9734
Error in socketConnection(host = "127.0.0.1", port = 9734, server = FALSE,  :
  cannot open the connection
In addition: Warning message:
In socketConnection(host = "127.0.0.1", port = 9734, server = FALSE,  :
  127.0.0.1:9734 cannot be opened



¿Any ideas?

Kjetil