Error(s) in re-building vignettes:
--- re-building 'xkcd-intro.Rnw' using Sweave
Warning in system(paste(shQuote(texi2dvi), if (quiet) "--quiet" else "",  :
  running command '"D:\compiler\texmf\miktex\bin\texify.exe" --quiet --pdf "xkcd-intro.tex" --max-iterations=20 -I "D:/RCompile/recent/R-4.1.0/share/texmf/tex/latex" -I "D:/RCompile/recent/R-4.1.0/share/texmf/bibtex/bst"' had status 1
Error: processing vignette 'xkcd-intro.Rnw' failed with diagnostics:
Failed to locate 'texi2pdf' output file 'xkcd-intro.pdf' for vignette with name 'xkcd-intro' and engine 'utils::Sweave'. The following files exist in working directory 'd:\RCompile\CRANpkg\local\4.1\xkcd.Rcheck\vign_test\xkcd\vignettes': 'article-ref.bib' (5604 bytes), 'convincing.png' (27383 bytes), 'gr1.pdf' (10321 bytes), 'gr1.png' (48156 bytes), 'graxis.png' (40326 bytes), 'grbar.png' (120201 bytes), 'grcaritas.png' (171354 bytes), 'grfonts.png' (48156 bytes), 'grhelp.png' (511619 bytes), 'grhomosapiens.png' (107760 bytes), 'grlatex.png' (20890 bytes), 'grmathematica.png' (26890 bytes), 'grmotherday.png' (379079 bytes), 'grnofonts.png' (45965 bytes), 'grpython.png' (24690 bytes), 'grrange.png' (38481 bytes), 'grsevan.png' (250657 bytes), 'grstickfigure.png' (115315 bytes), 'grtwo.png' (108642 bytes), 'jsslogo.jpg' (22731 bytes), 'xkcd-intro-008.png' (34256 bytes), 'xkcd-intro-011.png' (33455 bytes), 'xkcd-intro-012.png' (96047 bytes), 'xkcd-intro-015.png' (33455 bytes), 'xkcd-intro-016.png' (96047 bytes), 'xkcd-intro-017.png' (158008 bytes), 'xkcd-intro-018.png' (77967 bytes), 'xkcd-intro-021.png' (158008 bytes), 'xkcd-intro-022.png' (77967 bytes), 'xkcd-intro-CaritasSpain.png' (255566 bytes), 'xkcd-intro-angles.png' (120390 bytes), 'xkcd-intro-facetcity.png' (62030 bytes), 'xkcd-intro-facetvs.png' (69868 bytes), 'xkcd-intro-motherday.png' (354298 bytes), 'xkcd-intro-twoman.png' (58050 bytes), 'xkcd-intro.Rnw' (35045 bytes), 'xkcd-intro.tex' (23177 bytes)
--- failed re-building 'xkcd-intro.Rnw'

SUMMARY: processing the following file failed:
  'xkcd-intro.Rnw'

Error: Vignette re-building failed.
Execution halted