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=85952 on localhost:11284 at 11:41:25.267
starting worker pid=85953 on localhost:11284 at 11:41:25.302
Loading required package: marqLevAlg
loaded marqLevAlg and set parent environment
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
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