Hi, I get back the follow error:
output file: again.tex
Running pdflatex.exe on again.tex...failed
Error running C:/PROGRA~1/MIKTEX~1.9/miktex/bin/x64/pdflatex.exe (exit code 1)
I don´t know why, I have latex installed and it Works without problems. And R's tutorials about Knitr and HTML works. The files of the type .rnw are the only who doesn't compile.