Error(s) in re-building vignettes:
--- re-building 'ISOpureRGuide.Rnw' using knitr_notangle
Warning in system(paste(shQuote(texi2dvi), if (quiet) "--quiet" else "",  :
  running command '"C:\PROGRA~1\MiKTeX\miktex\bin\x64\texify.exe" --quiet --pdf "ISOpureRGuide.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 'ISOpureRGuide.Rnw' failed with diagnostics:
running 'texi2dvi' on 'ISOpureRGuide.tex' failed

LaTeX errors:
es/ISOpureRGuide.tex:293: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:320: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:347: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:377: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:399: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:423: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:452: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:469: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:504: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:543: Package xcolor Error: Undefined color `fgcolor'.

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es/ISOpureRGuide.tex:625: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:638: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:674: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:690: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
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es/ISOpureRGuide.tex:751: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
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es/ISOpureRGuide.tex:782: Package xcolor Error: Undefined color `fgcolor'.

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es/ISOpureRGuide.tex:808: Package xcolor Error: Undefined color `fgcolor'.

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Type  H <return>  for immediate help.
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es/ISOpureRGuide.tex:826: Package xcolor Error: Undefined color `fgcolor'.

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es/ISOpureRGuide.tex:852: Package xcolor Error: Undefined color `fgcolor'.

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es/ISOpureRGuide.tex:919: Package xcolor Error: Undefined color `fgcolor'.

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es/ISOpureRGuide.tex:939: Package xcolor Error: Undefined color `fgcolor'.

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Type  H <return>  for immediate help.
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es/ISOpureRGuide.tex:962: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:1000: Package xcolor Error: Undefined color `fgcolor'.

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Type  H <return>  for immediate help.
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es/ISOpureRGuide.tex:1032: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
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es/ISOpureRGuide.tex:1076: Package xcolor Error: Undefined color `fgcolor'.

See the xcolor package documentation for explanation.
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es/ISOpureRGuide.tex:1135: Package xcolor Error: Undefined color `fgcolor'.

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Type  H <return>  for immediate help.
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--- failed re-building 'ISOpureRGuide.Rnw'

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

Error: Vignette re-building failed.
Execution halted