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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 BUSseq
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* checking for file ‘BUSseq/DESCRIPTION’ ... OK
* preparing ‘BUSseq’:
* checking DESCRIPTION meta-information ... OK
* cleaning src
* installing the package to process help pages
* saving partial Rd database
* creating vignettes ... ERROR
--- re-building ‘BUSseq_user_guide.Rnw’ using knitr
2024-06-09 20:14:41.518 R[22037:37480876] XType: Using static font registry.
Error: processing vignette 'BUSseq_user_guide.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'BUSseq_user_guide.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.153 ...{rgb}{0.941, 0.941, 0.941}\color{fgcolor}
                                                  \begin{kframe}
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘BUSseq_user_guide.Rnw’

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

Error: Vignette re-building failed.
Execution halted