problem with lyx and knitr

knitr.lyx

#LyX 2.0 created this file. For more info see http://www.lyx.org/
\lyxformat 413
\begin_document
\begin_header
\textclass article
\use_default_options true
\begin_modules
knitr
\end_modules
\maintain_unincluded_children false
\language english
\language_package default
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\font_sf_scale 100
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\graphics default
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\use_amsmath 1
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\index Index
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\leftmargin 2cm
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\end_header

\begin_body

\begin_layout Standard
here is my test
\end_layout

\begin_layout Standard
\begin_inset ERT
status open

\begin_layout Plain Layout

<<summary>>=
\end_layout

\begin_layout Plain Layout

mod = lm(formula=speed ~ dist, data=cars)
\end_layout

\begin_layout Plain Layout

summary(mod)
\end_layout

\begin_layout Plain Layout

@
\end_layout

\end_inset


\end_layout

\end_body
\end_document



%%%%%%%%%%%%%%%%
%% LYX MESSAGE LOG
%%%%%%%%%%%%%%%%

18:36:45.944: Previewing ...
18:36:45.947: (buffer-view: ⌘R)
18:36:45.963: Rscript --verbose --no-save --no-restore "/Applications/LyX.app/Contents/Resources/scripts/lyxknitr.R" "/var/folders/bd/xhwzz96x2xl6b02bwt4myhy00000gn/T/lyx_tmpdir.JL1822/lyx_tmpbuf2/""test.Rnw" "/var/folders/bd/xhwzz96x2xl6b02bwt4myhy00000gn/T/lyx_tmpdir.JL1822/lyx_tmpbuf2/""test.tex" ISO-8859-15 "/Users/florianoswald/Dropbox/bankruptcy/data/philfed/2012/nevada/"
18:36:46.054: running
18:36:46.060:   '/Library/Frameworks/R.framework/Versions/2.15/Resources/bin/R --slave --no-restore --no-save --no-restore --file=/Applications/LyX.app/Contents/Resources/scripts/lyxknitr.R --args /var/folders/bd/
18:36:46.067: xhwzz96x2xl6b02bwt4myhy00000gn/T/lyx_tmpdir.JL1822/lyx_tmpbuf2/test.Rnw /var/folders/bd/xhwzz96x2xl6b02bwt4myhy00000gn/T/lyx_tmpdir.JL1822/lyx_tmpbuf2/test.tex ISO-8859-15'
18:36:46.068: 

Running: Rscript --verbose --no-save --no-restore "/Applications/LyX.app/Contents/Resources/scripts/lyxknitr.R" "/var/folders/bd/xhwzz96x2xl6b02bwt4myhy00000gn/T/lyx_tmpdir.JL1822/lyx_tmpbuf2/""test.Rnw" "/var/folders/bd/xhwzz96x2xl6b02bwt4myhy00000gn/T/lyx_tmpdir.JL1822/lyx_tmpbuf2/""test.tex" ISO-8859-15 "/Users/florianoswald/Dropbox/bankruptcy/data/philfed/2012/nevada/"
18:36:46.708: [1] TRUE
18:36:46.980: 
18:36:46.981: 
18:36:46.983: processing file: test.Rnw
18:36:47.001: 
  |                                                                       
  |                                                                 |   0%
  |                                             
18:36:47.002:                           
  |>>>>>>>>>>>>>>>>>>>>>>                                           |  33%
18:36:47.008:   ordinary text without R code
18:36:47.009: 
18:36:47.009: 
  |                                                                       
  |>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>                      |  67%
18:36:47.010: label: summary
18:36:47.179: 
  |                                                                       
  |>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>| 100%
18:36:47.181:   ordinary text without R code
18:36:47.182: 
18:36:47.182: 
18:36:47.184: output file: /Users/florianoswald/Dropbox/bankruptcy/data/philfed/2012/nevada/test.tex
18:36:47.185: 
18:36:47.185: [1] "test.tex"
18:36:47.186: [1] TRUE
18:36:47.225: pdflatex  "test.tex"
Running: pdflatex  "test.tex" > /dev/null
18:36:47.472: This is pdfTeX, Version 3.1415926-2.4-1.40.13 (TeX Live 2012)
18:36:47.473:  restricted \write18 enabled.
18:36:47.481: entering extended mode
18:36:47.483: (./test.tex
18:36:47.483: LaTeX2e <2011/06/27>
18:36:47.484: Babel <v3.8m> and hyphenation patterns for english, dumylang, nohyphenation, ge
18:36:47.484: rman-x-2012-05-30, ngerman-x-2012-05-30, afrikaans, ancientgreek, ibycus, arabi
18:36:47.485: c, armenian, basque, bulgarian, catalan, pinyin, coptic, croatian, czech, danis
18:36:47.485: h, dutch, ukenglish, usenglishmax, esperanto, estonian, ethiopic, farsi, finnis
18:36:47.486: h, french, friulan, galician, german, ngerman, swissgerman, monogreek, greek, h
18:36:47.486: ungarian, icelandic, assamese, bengali, gujarati, hindi, kannada, malayalam, ma
18:36:47.487: rathi, oriya, panjabi, tamil, telugu, indonesian, interlingua, irish, italian, 
18:36:47.487: kurmanji, latin, latvian, lithuanian, mongolian, mongolianlmc, bokmal, nynorsk,
18:36:47.487:  polish, portuguese, romanian, romansh, russian, sanskrit, serbian, serbianc, s
18:36:47.488: lovak, slovenian, spanish, swedish, turkish, turkmen, ukrainian, uppersorbian, 
18:36:47.488: welsh, loaded.
18:36:47.489: 
18:36:48.085: Error while previewing format: pdf2/Users/Shared/LyX/lyx-2.0.4/src/support/Systemcall.cpp(273): Systemcall: 'pdflatex  "test.tex"' finished with exit code 1



%%%%%%%%%%%%%%%%
% tex file
%%%%%%%%%%%%%%%%

% Preview source code

%% LyX 2.0.4 created this file.  For more info, see http://www.lyx.org/.
%% Do not edit unless you really know what you are doing.
\documentclass[11pt,english]{article}
\usepackage{lmodern}
\renewcommand{\sfdefault}{lmss}
\renewcommand{\ttdefault}{lmtt}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}
\usepackage[a4paper]{geometry}
\geometry{verbose,lmargin=2cm,rmargin=2cm}
\setlength{\parskip}{\smallskipamount}
\setlength{\parindent}{0pt}
\usepackage{babel}
\begin{document}
here is my second test

<<summary>>=
mod = lm(formula=speed ~ dist, data=cars)
summary(mod)
@
\end{document}