Error(s) in re-building vignettes:
--- re-building 'MMPC_tutorial.Rmd' using knitr
Warning in file(file, "rt") :
  cannot open URL 'ftp://ftp.ics.uci.edu/pub/machine-learning-databases/wine/wine.data': FTP status was '550 Requested action not taken; file unavailable'
Quitting from lines 92-119 (MMPC_tutorial.Rmd) 
Error: processing vignette 'MMPC_tutorial.Rmd' failed with diagnostics:
cannot open the connection to 'ftp://ftp.ics.uci.edu/pub/machine-learning-databases/wine/wine.data'
--- failed re-building 'MMPC_tutorial.Rmd'

--- re-building 'SES_KMVerrou_11_12.Rmd' using knitr

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

Quitting from lines 54-67 (SES_KMVerrou_11_12.Rmd) 
Error: processing vignette 'SES_KMVerrou_11_12.Rmd' failed with diagnostics:
cannot open the connection to 'ftp://ftp.ics.uci.edu/pub/machine-learning-databases/wine/wine.data'
--- failed re-building 'SES_KMVerrou_11_12.Rmd'

--- re-building 'FS_guide.ltx' using tex
texify: C:\jenkins\workspace\miktex\windows\build\source\Libraries\MiKTeX\Core\Utils\Utils.cpp:490: internal error

Warning in system(paste(shQuote(texi2dvi), "--version"), intern = TRUE) :
  running command '"C:\PROGRA~1\MiKTeX\miktex\bin\x64\texify.exe" --version' had status 5
Warning in value[[3L]](cond) : 
--- finished re-building 'FS_guide.ltx'

--- re-building 'article.ltx' using tex
texify: C:\jenkins\workspace\miktex\windows\build\source\Libraries\MiKTeX\Core\Utils\Utils.cpp:490: internal error

Warning in system(paste(shQuote(texi2dvi), "--version"), intern = TRUE) :
  running command '"C:\PROGRA~1\MiKTeX\miktex\bin\x64\texify.exe" --version' had status 5
Warning in value[[3L]](cond) : 
--- finished re-building 'article.ltx'

--- re-building 'guide.ltx' using tex
texify: C:\jenkins\workspace\miktex\windows\build\source\Libraries\MiKTeX\Core\Utils\Utils.cpp:490: internal error

Warning in system(paste(shQuote(texi2dvi), "--version"), intern = TRUE) :
  running command '"C:\PROGRA~1\MiKTeX\miktex\bin\x64\texify.exe" --version' had status 5
Warning in value[[3L]](cond) : 
--- finished re-building 'guide.ltx'

SUMMARY: processing the following files failed:
  'MMPC_tutorial.Rmd' 'SES_KMVerrou_11_12.Rmd'

Error: Vignette re-building failed.
Execution halted