Error(s) in re-building vignettes:
--- re-building ‘clustered.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 92-109 (clustered.Rmd) 
Error: processing vignette 'clustered.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘clustered.Rmd’

--- re-building ‘correlated.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘correlated.Rmd’

--- re-building ‘double_dot_extension.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 121-136 (double_dot_extension.Rmd) 
Error: processing vignette 'double_dot_extension.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘double_dot_extension.Rmd’

--- re-building ‘longitudinal.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 63-75 (longitudinal.Rmd) 
Error: processing vignette 'longitudinal.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘longitudinal.Rmd’

--- re-building ‘missing.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 177-200 (missing.Rmd) 
Error: processing vignette 'missing.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘missing.Rmd’

--- re-building ‘ordinal.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 60-108 (ordinal.Rmd) 
Error: processing vignette 'ordinal.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘ordinal.Rmd’

--- re-building ‘simstudy.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
`geom_smooth()` using method = 'gam' and formula 'y ~ s(x, bs = "cs")'
Quitting from lines 305-309 (simstudy.Rmd) 
Error: processing vignette 'simstudy.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘simstudy.Rmd’

--- re-building ‘spline.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 49-55 (spline.Rmd) 
Error: processing vignette 'spline.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘spline.Rmd’

--- re-building ‘survival.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 251-266 (survival.Rmd) 
Error: processing vignette 'survival.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘survival.Rmd’

--- re-building ‘treat_and_exposure.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 107-117 (treat_and_exposure.Rmd) 
Error: processing vignette 'treat_and_exposure.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘treat_and_exposure.Rmd’

SUMMARY: processing the following files failed:
  ‘clustered.Rmd’ ‘double_dot_extension.Rmd’ ‘longitudinal.Rmd’
  ‘missing.Rmd’ ‘ordinal.Rmd’ ‘simstudy.Rmd’ ‘spline.Rmd’
  ‘survival.Rmd’ ‘treat_and_exposure.Rmd’

Error: Vignette re-building failed.
Execution halted