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

--- re-building ‘cmstatr_Graphing.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: '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 102-112 (cmstatr_Graphing.Rmd) 
Error: processing vignette 'cmstatr_Graphing.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘cmstatr_Graphing.Rmd’

--- re-building ‘cmstatr_Tutorial.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: '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 209-216 (cmstatr_Tutorial.Rmd) 
Error: processing vignette 'cmstatr_Tutorial.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘cmstatr_Tutorial.Rmd’

--- re-building ‘cmstatr_Validation.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: 'dplyr'

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

    filter, lag

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

    intersect, setdiff, setequal, union


Attaching package: 'testthat'

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

    matches

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

    is_null

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

    matches

--- finished re-building ‘cmstatr_Validation.Rmd’

--- re-building ‘hk_ext.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 ‘hk_ext.Rmd’

SUMMARY: processing the following files failed:
  ‘cmstatr_Graphing.Rmd’ ‘cmstatr_Tutorial.Rmd’

Error: Vignette re-building failed.
Execution halted