Error(s) in re-building vignettes:
  ...
--- re-building ‘AQuickStart.Rnw’ using knitr
Error: processing vignette 'AQuickStart.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'AQuickStart.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.120 ...{rgb}{0.969, 0.969, 0.969}\color{fgcolor}
                                                  \begin{kframe}
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘AQuickStart.Rnw’

--- re-building ‘gMCP.Rnw’ using knitr
Error: processing vignette 'gMCP.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'gMCP.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.331 ...{rgb}{0.969, 0.969, 0.969}\color{fgcolor}
                                                  \begin{kframe}
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘gMCP.Rnw’

Warning messages:
1: In wilcox.test.default(x, y, alternative = "less", correct = TRUE) :
  cannot compute exact p-value with ties
2: In wilcox.test.default(x, y, alternative = "less", correct = TRUE) :
  cannot compute exact p-value with ties
3: In wilcox.test.default(x, y, alternative = "less", correct = TRUE) :
  cannot compute exact p-value with ties
4: In wilcox.test.default(x, y, alternative = "less", correct = TRUE) :
  cannot compute exact p-value with ties
5: In wilcox.test.default(x, y, alternative = "less", correct = TRUE) :
  cannot compute exact p-value with ties
--- re-building ‘parametric.Rnw’ using knitr
Error: processing vignette 'parametric.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'parametric.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.217 ...{rgb}{0.969, 0.969, 0.969}\color{fgcolor}
                                                  \begin{kframe}
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘parametric.Rnw’

SUMMARY: processing the following files failed:
  ‘AQuickStart.Rnw’ ‘gMCP.Rnw’ ‘parametric.Rnw’

Error: Vignette re-building failed.
Execution halted