Error in re-building vignettes:
  ...
Loading required package: alabama
Loading required package: numDeriv
Loading required package: nleqslv
Loading required package: BB
Loading required package: SQUAREM
Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in Delta1_xk * mystep :
  Recycling array of length 1 in vector-array arithmetic is deprecated.
  Use c() or as.vector() instead.

Warning in system(paste(shQuote(texi2dvi), if (quiet) "--quiet" else "",  :
  running command '"D:\compiler\texmf\miktex\bin\texify.exe" --quiet --pdf "GNE-howto.tex" --max-iterations=20 -I "D:/RCompile/recent/R-3.5.0/share/texmf/tex/latex" -I "D:/RCompile/recent/R-3.5.0/share/texmf/bibtex/bst"' had status 1
Error in find_vignette_product(name, by = "texi2pdf", engine = engine) : 
  Failed to locate the 'texi2pdf' output file (by engine 'utils::Sweave') for vignette with name 'GNE-howto'. The following files exist in directory '.': 'GNE-howto-concordance.tex', 'GNE-howto.Rnw', 'GNE-howto.bib', 'GNE-howto.tex'
Calls: buildVignettes -> find_vignette_product
Execution halted