Error(s) in re-building vignettes:
--- re-building ‘MI_boot.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 ‘MI_boot.Rmd’

--- re-building ‘MI_cv_naive.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 ‘MI_cv_naive.Rmd’

--- re-building ‘boot_MI.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 ‘boot_MI.Rmd’

--- re-building ‘cv_MI.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 ‘cv_MI.Rmd’

--- re-building ‘cv_MI_RR.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 ‘cv_MI_RR.Rmd’

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

Attaching package: 'mice'

The following object is masked from 'package:stats':

    filter

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

    cbind, rbind

Quitting from lines 130-140 (development_workflow.Rmd) 
Error: processing vignette 'development_workflow.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘development_workflow.Rmd’

--- re-building ‘psfmi_CoxModels.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 ‘psfmi_CoxModels.Rmd’

--- re-building ‘psfmi_LogisticModels.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 ‘psfmi_LogisticModels.Rmd’

--- re-building ‘psfmi_StabilityAnalysis.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 ‘psfmi_StabilityAnalysis.Rmd’

--- re-building ‘psfmi_mice.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 ‘psfmi_mice.Rmd’

SUMMARY: processing the following file failed:
  ‘development_workflow.Rmd’

Error: Vignette re-building failed.
Execution halted