Error(s) in re-building vignettes:
  ...
--- re-building ‘MM2S.Rnw’ using knitr
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "labelcex" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "labelcex" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "labelcex" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "labelcex" is not a graphical parameter
Error: processing vignette 'MM2S.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'MM2S.tex' failed.
LaTeX errors:
! Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Emergency stop.
 ...                                              
                                                  
l.130 ...{rgb}{0.969, 0.969, 0.969}\color{fgcolor}
                                                  \begin{kframe}
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘MM2S.Rnw’

--- re-building ‘MM2S_FromRawData.Rnw’ using knitr
Error: processing vignette 'MM2S_FromRawData.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'MM2S_FromRawData.tex' failed.
LaTeX errors:
! Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Emergency stop.
 ...                                              
                                                  
l.125 ...{rgb}{0.969, 0.969, 0.969}\color{fgcolor}
                                                  \begin{kframe}
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘MM2S_FromRawData.Rnw’

SUMMARY: processing the following files failed:
  ‘MM2S.Rnw’ ‘MM2S_FromRawData.Rnw’

Error: Vignette re-building failed.
Execution halted