Error(s) in re-building vignettes:
--- re-building 'mfbvar_jss.Rnw' 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

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

LaTeX errors:
var_jss.tex:568: LaTeX Error: Command \ttfamily invalid in math mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
var_jss.tex:625: LaTeX Error: Command \ttfamily invalid in math mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
var_jss.tex:625: LaTeX Error: Command \ttfamily invalid in math mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
var_jss.tex:625: LaTeX Error: Command \ttfamily invalid in math mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
var_jss.tex:685: LaTeX Error: Command \ttfamily invalid in math mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
var_jss.tex:685: LaTeX Error: Command \ttfamily invalid in math mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
var_jss.tex:685: LaTeX Error: Command \ttfamily invalid in math mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
var_jss.tex:709: LaTeX Error: Not in outer par mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
var_jss.tex:712: LaTeX Error: Command \ttfamily invalid in math mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
var_jss.tex:717: LaTeX Error: Not in outer par mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
var_jss.tex:726: LaTeX Error: Not in outer par mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              

--- failed re-building 'mfbvar_jss.Rnw'

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

Error: Vignette re-building failed.
Execution halted