• using R version 3.6.2 (2019-12-12)
• using platform: x86_64-apple-darwin15.6.0 (64-bit)
• using session charset: UTF-8
• checking for file ‘DiagrammeR/DESCRIPTION’ ... OK
• checking extension type ... Package
• this is package ‘DiagrammeR’ version ‘1.0.6.1’
• package encoding: UTF-8
• checking package namespace information ... OK
• checking package dependencies ... OK
• checking if this is a source package ... OK
• checking if there is a namespace ... OK
• checking for executable files ... OK
• checking for hidden files and directories ... OK
• checking for portable file names ... OK
• checking for sufficient/correct file permissions ... OK
• checking whether package ‘DiagrammeR’ can be installed ... [18s/18s] OK
• checking installed package size ... NOTE
    installed size is 14.1Mb
    sub-directories of 1Mb or more:
      doc 9.7Mb
      htmlwidgets 2.8Mb
• checking package directory ... OK
• checking ‘build’ directory ... OK
• checking DESCRIPTION meta-information ... OK
• checking top-level files ... OK
• checking for left-over files ... OK
• checking index information ... OK
• checking package subdirectories ... OK
• checking R files for non-ASCII characters ... OK
• checking R files for syntax errors ... OK
• checking whether the package can be loaded ... OK
• checking whether the package can be loaded with stated dependencies ... OK
• checking whether the package can be unloaded cleanly ... OK
• checking whether the namespace can be loaded with stated dependencies ... OK
• checking whether the namespace can be unloaded cleanly ... OK
• checking loading without being on the library search path ... OK
• checking dependencies in R code ... OK
• checking S3 generic/method consistency ... OK
• checking replacement functions ... OK
• checking foreign function calls ... OK
• checking R code for possible problems ... [25s/25s] OK
• checking Rd files ... OK
• checking Rd metadata ... OK
• checking Rd cross-references ... OK
• checking for missing documentation entries ... OK
• checking for code/documentation mismatches ... OK
• checking Rd \usage sections ... OK
• checking Rd contents ... OK
• checking for unstated dependencies in examples ... OK
• checking contents of ‘data’ directory ... OK
• checking data for non-ASCII characters ... NOTE
    Note: found 1 marked UTF-8 string
• checking data for ASCII and uncompressed saves ... OK
• checking installed files from ‘inst/doc’ ... OK
• checking files in ‘vignettes’ ... OK
• checking examples ... [28s/27s] OK
• checking for unstated dependencies in ‘tests’ ... OK
• checking tests ... [47s/46s] OK
    Running ‘testthat.R’ [47s/46s]
• checking for unstated dependencies in vignettes ... OK
• checking package vignettes in ‘inst/doc’ ... OK
• checking running R code from vignettes ... [2s/2s] NONE
    ‘graphviz-mermaid.Rmd’using ‘UTF-8’... [0s/0s] OK
    ‘node-edge-data-frames.Rmd’using ‘UTF-8’... [0s/0s] OK
    ‘selections.Rmd’using ‘UTF-8’... [0s/0s] OK
    ‘simple-graphs-ndfs-edfs.Rmd’using ‘UTF-8’... [0s/0s] OK
    ‘traversals.Rmd’using ‘UTF-8’... [0s/0s] OK
• checking re-building of vignette outputs ... [12s/12s] WARNING
  Error(s) in re-building vignettes:
  --- re-building ‘graphviz-mermaid.Rmd’ using rmarkdown
  Warning in engine$weave(file, quiet = quiet, encoding = enc) :
    Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
  Quitting from lines 57-79 (graphviz-mermaid.Rmd)
  Error: processing vignette 'graphviz-mermaid.Rmd' failed with diagnostics:
  cannot open the connection
  --- failed re-building ‘graphviz-mermaid.Rmd’
  
  --- re-building ‘node-edge-data-frames.Rmd’ using rmarkdown
  Warning in engine$weave(file, quiet = quiet, encoding = enc) :
    Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
  --- finished re-building ‘node-edge-data-frames.Rmd’
  
  --- re-building ‘selections.Rmd’ using rmarkdown
  Warning in engine$weave(file, quiet = quiet, encoding = enc) :
    Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
  Quitting from lines 317-356 (selections.Rmd)
  Error: processing vignette 'selections.Rmd' failed with diagnostics:
  cannot open the connection
  --- failed re-building ‘selections.Rmd’
  
  --- re-building ‘simple-graphs-ndfs-edfs.Rmd’ using rmarkdown
  Warning in engine$weave(file, quiet = quiet, encoding = enc) :
    Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
  Quitting from lines 165-166 (simple-graphs-ndfs-edfs.Rmd)
  Error: processing vignette 'simple-graphs-ndfs-edfs.Rmd' failed with diagnostics:
  cannot open the connection
  --- failed re-building ‘simple-graphs-ndfs-edfs.Rmd’
  
  --- re-building ‘traversals.Rmd’ using rmarkdown
  Warning in engine$weave(file, quiet = quiet, encoding = enc) :
    Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
  Quitting from lines 102-116 (traversals.Rmd)
  Error: processing vignette 'traversals.Rmd' failed with diagnostics:
  cannot open the connection
  --- failed re-building ‘traversals.Rmd’
  
  SUMMARY: processing the following files failed:
    ‘graphviz-mermaid.Rmd’ ‘selections.Rmd’ ‘simple-graphs-ndfs-edfs.Rmd’
    ‘traversals.Rmd’
  
  Error: Vignette re-building failed.
  Execution halted
  
• checking PDF version of manual ... OK
• DONE
  Status: 1 WARNING, 2 NOTEs