Error(s) in re-building vignettes:
  ...
--- re-building ‘brms_customfamilies.Rmd’ using rmarkdown
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
--- finished re-building ‘brms_customfamilies.Rmd’

--- re-building ‘brms_distreg.Rmd’ using rmarkdown
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
--- finished re-building ‘brms_distreg.Rmd’

--- re-building ‘brms_families.Rmd’ using rmarkdown
--- finished re-building ‘brms_families.Rmd’

--- re-building ‘brms_missings.Rmd’ using rmarkdown
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
--- finished re-building ‘brms_missings.Rmd’

--- re-building ‘brms_monotonic.Rmd’ using rmarkdown
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
--- finished re-building ‘brms_monotonic.Rmd’

--- re-building ‘brms_multivariate.Rmd’ using rmarkdown
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
--- finished re-building ‘brms_multivariate.Rmd’

--- re-building ‘brms_nonlinear.Rmd’ using rmarkdown
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
--- finished re-building ‘brms_nonlinear.Rmd’

--- re-building ‘brms_phylogenetics.Rmd’ using rmarkdown
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
--- finished re-building ‘brms_phylogenetics.Rmd’

--- re-building ‘brms_threading.Rmd’ using rmarkdown
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
Warning in hook_png(..., cmd = "pngquant", post_process = function(x) { :
  cannot find pngquant; please install and put it in PATH
--- finished re-building ‘brms_threading.Rmd’

--- re-building ‘brms_multilevel.ltx’ using tex
Error: processing vignette 'brms_multilevel.ltx' failed with diagnostics:
Running 'texi2dvi' on 'brms_multilevel.ltx' failed.
LaTeX errors:
! Undefined control sequence.
<argument> cite.\@citeb 
                        \@extra@b@citeb 
l.55 \begin{document}
                     
! Emergency stop.
<argument> cite.\@citeb 
                        \@extra@b@citeb 
l.55 \begin{document}
                     
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘brms_multilevel.ltx’

--- re-building ‘brms_overview.ltx’ using tex
Error: processing vignette 'brms_overview.ltx' failed with diagnostics:
Running 'texi2dvi' on 'brms_overview.ltx' failed.
LaTeX errors:
! Undefined control sequence.
<argument> cite.\@citeb 
                        \@extra@b@citeb 
l.54 \begin{document}
                     
! Emergency stop.
<argument> cite.\@citeb 
                        \@extra@b@citeb 
l.54 \begin{document}
                     
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘brms_overview.ltx’

SUMMARY: processing the following files failed:
  ‘brms_multilevel.ltx’ ‘brms_overview.ltx’

Error: Vignette re-building failed.
Execution halted