Error(s) in re-building vignettes:
--- re-building ‘FAQ.Rmd’ using rmarkdown
Loading required package: fitdistrplus
Loading required package: MASS
Loading required package: survival

Attaching package: 'actuar'

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

    cm

Loading required package: mc2d
Loading required package: mvtnorm

Attaching package: 'mc2d'

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

    pmax, pmin

Quitting from lines 366-379 (FAQ.Rmd) 
Error: processing vignette 'FAQ.Rmd' failed with diagnostics:
data must be a numeric vector of length greater than 1
--- failed re-building ‘FAQ.Rmd’

--- re-building ‘Optimalgo.Rmd’ using rmarkdown
Loading required package: fitdistrplus
Loading required package: MASS
Loading required package: survival
Loading required package: knitr
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "plot.np" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "plot.np" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "plot.np" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "plot.np" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "plot.np" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "plot.np" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "plot.np" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "plot.np" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "plot.np" is not a graphical parameter
Warning in doTryCatch(return(expr), name, parentenv, handler) :
  "plot.np" is not a graphical parameter
--- finished re-building ‘Optimalgo.Rmd’

--- re-building ‘paper2JSS.Rnw’ using Sweave
Loading required package: MASS
Loading required package: survival

Attaching package: ‘actuar’

The following object is masked from ‘package:grDevices’:

    cm

Loading required package: rgenoud
##  rgenoud (Version 5.8-3.0, Build Date: 2019-01-22)
##  See http://sekhon.berkeley.edu/rgenoud for additional documentation.
##  Please cite software as:
##   Walter Mebane, Jr. and Jasjeet S. Sekhon. 2011.
##   ``Genetic Optimization Using Derivatives: The rgenoud package for R.''
##   Journal of Statistical Software, 42(11): 1-26. 
##

--- finished re-building ‘paper2JSS.Rnw’

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

Error: Vignette re-building failed.
Execution halted