R help - Jul 2006 - Sweave error in example code

Hi.. I am running R version 2.3.1 on a Windows XP machine with the latest Miktex
2.5 installed. I get no errors from R when running the Sweave example,

testfile <- system.file("Sweave", "Sweave-test-1.Rnw",
package = "utils")

However, when I tex the resulting .tex file (after installing a4.sty) I get the
error below.

This is pdfeTeX, Version 3.141592-1.30.6-2.2 (MiKTeX 2.5 RC 1)
entering extended mode
(Sweave-test-1.tex
LaTeX2e <2005/12/01>
Babel <v3.8g> and hyphenation patterns for english, dumylang,
nohyphenation, ge
rman, ngerman, french, loaded.
("C:\Program Files\MiKTeX 2.5\tex\latex\base\article.cls"
Document Class: article 2005/09/16 v1.4f Standard LaTeX document class
("C:\Program Files\MiKTeX 2.5\tex\latex\base\size10.clo"))
("C:\Program Files\MiKTeX 2.5\tex\latex\ltxmisc\a4wide.sty"
("C:\Program Files\MiKTeX 2.5\tex\latex\ntgclass\a4.sty"))
! Missing \endcsname inserted.
<to be read again> 
                   \protect 
l.11 \begin
           {document}
? 
	[[alternative HTML version deleted]]

LL wrote:
> Hi.. I am running R version 2.3.1 on a Windows XP machine with the latest
Miktex 2.5 installed. I get no errors from R when running the Sweave example,
> 
> testfile <- system.file("Sweave",
"Sweave-test-1.Rnw", package = "utils")
> 
> However, when I tex the resulting .tex file (after installing a4.sty) I get
the error below.
> 
> This is pdfeTeX, Version 3.141592-1.30.6-2.2 (MiKTeX 2.5 RC 1)
> entering extended mode
> (Sweave-test-1.tex
> LaTeX2e <2005/12/01>
> Babel <v3.8g> and hyphenation patterns for english, dumylang,
nohyphenation, ge
> rman, ngerman, french, loaded.
> ("C:\Program Files\MiKTeX 2.5\tex\latex\base\article.cls"
> Document Class: article 2005/09/16 v1.4f Standard LaTeX document class
> ("C:\Program Files\MiKTeX 2.5\tex\latex\base\size10.clo"))
> ("C:\Program Files\MiKTeX 2.5\tex\latex\ltxmisc\a4wide.sty"
> ("C:\Program Files\MiKTeX 2.5\tex\latex\ntgclass\a4.sty"))
> ! Missing \endcsname inserted.
> <to be read again> 
>                    \protect 
> l.11 \begin
>            {document}
> ? 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

This works for me. However, when I ran this, MiKTeX prompted me to 
install the ntgclass package, which I did. Everything ran smoothly after 
that. I'm using R-2.3.1 with MiKTeX 2.4 in WinXP Pro.

HTH,

--sundar