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### Running command:
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###   /Library/Frameworks/R.framework/Resources/bin/R CMD build --keep-empty-dirs --no-resave-data BUMHMM
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* checking for file ‘BUMHMM/DESCRIPTION’ ... OK
* preparing ‘BUMHMM’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘BUMHMM.Rnw’ using knitr
Error: processing vignette 'BUMHMM.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'BUMHMM.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.139 ...{rgb}{0.941, 0.941, 0.941}\color{fgcolor}
                                                  \begin{kframe}
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘BUMHMM.Rnw’

SUMMARY: processing the following file failed:
  ‘BUMHMM.Rnw’

Error: Vignette re-building failed.
Execution halted