Error(s) in re-building vignettes:
--- re-building 'collin.Rnw' using knitr
Warning in system(paste(shQuote(texi2dvi), if (quiet) "--quiet" else "",  :
  running command '"C:\PROGRA~1\MiKTeX\miktex\bin\x64\texify.exe" --quiet --pdf "collin.tex" --max-iterations=20 -I "C:/r_packages/rinst/share/texmf/tex/latex" -I "C:/r_packages/rinst/share/texmf/bibtex/bst"' had status 1
Error: processing vignette 'collin.Rnw' failed with diagnostics:
running 'texi2dvi' on 'collin.tex' failed

LaTeX errors:
lin.tex:160: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:169: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:175: Package xcolor Error: Undefined color `messagecolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:178: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:187: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:260: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:270: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:277: Package xcolor Error: Undefined color `messagecolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:295: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:357: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:392: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:424: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:440: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:456: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:488: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:500: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:516: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:531: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:552: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:563: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:578: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:593: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:613: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:624: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:652: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:682: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:699: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:743: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:795: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:810: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:826: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:841: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:868: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:894: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:923: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:935: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:952: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:969: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:990: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
lin.tex:1001: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package do
--- failed re-building 'collin.Rnw'

SUMMARY: processing the following file failed:
  'collin.Rnw'

Error: Vignette re-building failed.
Execution halted