[Rd] Error with named chunks in Sweave with the development version of R

[Duncan Murdoch]

Thanks, I'll take a look.  The "internal error" message was intended to 
catch this kind of problem.

Duncan Murdoch

On 07/02/2011 7:36 AM, Clément Calenge wrote:
> Dear all,
>
> There seems to be a problem with named chunks in Sweave with the version
> of R under development (downloaded yesterday). When I sweave the file
> toto.Rnw described at the end of this mail (Ubuntu 10.04 LTS), the
> function Sweave returns an Internal error:
>
>   >  utils::Sweave("toto.Rnw")
> Writing to file toto.tex
> Processing code chunks ...
>    1 : echo term verbatim (label=a)
>    2 : echo term verbatim (label=c)
>    3 : echo term verbatim (label=b)
>    4 : echo term verbatim (label=d)
>
> Error:  chunk 4 (label=d)
> Error in eval(expr, envir, enclos) : Internal Sweave error
>
> I did not find the cause of this problem, except that it occurs when
> Sweave is called on a file with named chunks. Note that the function
> Sweave works fine with the latest stable version of R (both R-2.12.1 and
> R-patched). And I found nothing about this problem in the NEWS file of
> the development version. I am not sure, but I wonder whether this might
> be a bug... could you confirm?
>
>   >  version
>                  _
> platform       i686-pc-linux-gnu
> arch           i686
> os             linux-gnu
> system         i686, linux-gnu
> status         Under development (unstable)
> major          2
> minor          13.0
> year           2011
> month          02
> day            06
> svn rev        54234
> language       R
> version.string R version 2.13.0 Under development (unstable) (2011-02-06
> r54234)
>
>   >  sessionInfo()
> R version 2.13.0 Under development (unstable) (2011-02-06 r54234)
> Platform: i686-pc-linux-gnu (32-bit)
>
> locale:
>    [1] LC_CTYPE=en_US.utf8       LC_NUMERIC=C
>    [3] LC_TIME=en_US.utf8        LC_COLLATE=en_US.utf8
>    [5] LC_MONETARY=C             LC_MESSAGES=en_US.utf8
>    [7] LC_PAPER=en_US.utf8       LC_NAME=C
>    [9] LC_ADDRESS=C              LC_TELEPHONE=C
> [11] LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> other attached packages:
> [1] fortunes_1.4-0  lattice_0.19-13
>
> loaded via a namespace (and not attached):
> [1] grid_2.13.0
>
>
> ==============================
> % file: toto.Rnw
>
> \documentclass{article}
> \usepackage{Sweave}
> \begin{document}
>
> <<a>>=
> a<- 1
> @
>
> <<c>>=
> b<- 1
> @
>
> <<b>>=
> u<- 1:10
> @
>
> A test:
>
> <<d>>=
> <<a>>
> <<b>>
> <<c>>
> @
>
> \end{document}
>
>