Error(s) in re-building vignettes:
--- re-building ‘mla.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
starting worker pid=61776 on localhost:11440 at 12:38:13.245
starting worker pid=61775 on localhost:11440 at 12:38:13.312
Loading required package: marqLevAlg
Loading required package: marqLevAlg
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
loaded marqLevAlg and set parent environment
Quitting from lines 389-482 (mla.Rmd) 
Error: processing vignette 'mla.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘mla.Rmd’

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

Error: Vignette re-building failed.
Execution halted