[R] pgfSweave-example not compiling

[Peter Meilstrup]

I'm trying to get pgfSweave up and running. Hopefully I can get it
working from within LyX, but first I'm just trying to get the simplest
possible thing (compiling one of the example files in the pgfSweave
package) to work. I'm using the example that comes in the pgfSweave
package unmodified, but for reference I copied it to:

http://pastebin.com/tW4RL6fs

Configuration:
R version 2.13.1 on OS X (intel) 10.5.8
pgfSweave package version 1.2.1
tikzDevice version 0.6.1
MacTeX 2011 installed
tikz/pgf package version 2.10

Here is what I tried; I copied the file pgfSweave-example.Rnw into my
working directory, created a "cache" dir and ran:

> require("pgfSweave")
> pgfSweave("pgfSweave-example.Rnw")

This did some computation and then complained about a missing bracket:

! Missing } inserted.
<inserted text>
                }
l.439 \end{figure}

After I dismissed this, it seemed to fail with various errors.

make: *** [pgfSweave-example-boxplot.pdf] Error 1
Error in tools::texi2dvi(paste(fn, "tex", sep = "."), pdf = pdf, ...) :
  Running 'texi2dvi' on 'pgfSweave-example.tex' failed.
LaTeX errors:
! Package tikz Warning: Some images are not up-to-date and need to be generated
.  [1

Rerunning pgfSweave led to the same errors.
The process created a .pdf file, but in place of a figure it has the notice:

"[[ Image Discarded Due To ‘/tikz/external/mode=list and make’ ]] NA  "

Upon inspecting the log file I found this notice:

===== mode=`list and make': Use 'make -f pgfSweave-example.makefile' to generat
e all images. Then, re-run (pdf)latex pgfSweave-example. =====

I tried following this instruction, but it also produced an error:

bayanus-2:writing peter$ make -f pgfSweave-example.makefile
pdflatex -halt-on-error -interaction=batchmode -jobname
"pgfSweave-example-boxplot"
"\def\tikzexternalrealjob{pgfSweave-example}\input{pgfSweave-example}"
This is pdfTeX, Version 3.1415926-2.3-1.40.12 (TeX Live 2011)
 restricted \write18 enabled.
entering extended mode
make: *** [pgfSweave-example-boxplot.pdf] Error 1

I put the full R transcript at http://pastebin.com/aZECxKyP in case
that contains additional useful information.
I also put the contents of pgfSweave-example.log at
http://pastebin.com/LzZW1z3R .
Also pgfSweave-example-boxplot.log at http://pastebin.com/AF3TCCEK .

What's going wrong?
Cheers,
Peter