Error(s) in re-building vignettes:
--- re-building ‘AQuickStart.Rmd’ using rmarkdown
--- finished re-building ‘AQuickStart.Rmd’

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

--- re-building ‘basics.Rmd’ using rmarkdown
Quitting from lines 260-262 (basics.Rmd) 
Error: processing vignette 'basics.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘basics.Rmd’

--- re-building ‘comparisons.Rmd’ using rmarkdown
Quitting from lines 113-114 (comparisons.Rmd) 
Error: processing vignette 'comparisons.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘comparisons.Rmd’

--- re-building ‘confidence-intervals.Rmd’ using rmarkdown
--- finished re-building ‘confidence-intervals.Rmd’

--- re-building ‘interactions.Rmd’ using rmarkdown
Quitting from lines 76-77 (interactions.Rmd) 
Error: processing vignette 'interactions.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘interactions.Rmd’

--- re-building ‘messy-data.Rmd’ using rmarkdown
Quitting from lines 118-119 (messy-data.Rmd) 
Error: processing vignette 'messy-data.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘messy-data.Rmd’

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

--- re-building ‘predictions.Rmd’ using rmarkdown
Quitting from lines 113-114 (predictions.Rmd) 
Error: processing vignette 'predictions.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘predictions.Rmd’

--- re-building ‘re-engineering-clds.Rmd’ using rmarkdown
--- finished re-building ‘re-engineering-clds.Rmd’

--- re-building ‘sophisticated.Rmd’ using rmarkdown
Quitting from lines 440-441 (sophisticated.Rmd) 
Error: processing vignette 'sophisticated.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘sophisticated.Rmd’

--- re-building ‘transformations.Rmd’ using rmarkdown
Quitting from lines 197-198 (transformations.Rmd) 
Error: processing vignette 'transformations.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘transformations.Rmd’

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

--- re-building ‘vignette-topics.Rmd’ using rmarkdown
--- finished re-building ‘vignette-topics.Rmd’

--- re-building ‘xplanations.Rmd’ using rmarkdown
Quitting from lines 198-203 (xplanations.Rmd) 
Error: processing vignette 'xplanations.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘xplanations.Rmd’

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

SUMMARY: processing the following files failed:
  ‘basics.Rmd’ ‘comparisons.Rmd’ ‘interactions.Rmd’ ‘messy-data.Rmd’ ‘predictions.Rmd’
  ‘sophisticated.Rmd’ ‘transformations.Rmd’ ‘xplanations.Rmd’

Error: Vignette re-building failed.
Execution halted