Error(s) in re-building vignettes:
--- re-building 'interp.Rnw' using Sweave
Bibliography warnings for 'interp':
empty journal in sinclair:16
--- finished re-building 'interp.Rnw'

--- re-building 'partDeriv.Rnw' using Sweave
Loading required package: Rcpp

Attaching package: 'Ryacas'

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

    integrate

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

    %*%, det, diag, diag<-, lower.tri, upper.tri

Warning: `stat_contour()`: Zero contours were generated
Warning in min(x) : no non-missing arguments to min; returning Inf
Warning in max(x) : no non-missing arguments to max; returning -Inf
Warning: `stat_contour()`: Zero contours were generated
Warning in min(x) : no non-missing arguments to min; returning Inf
Warning in max(x) : no non-missing arguments to max; returning -Inf
Warning: `stat_contour()`: Zero contours were generated
Warning in min(x) : no non-missing arguments to min; returning Inf
Warning in max(x) : no non-missing arguments to max; returning -Inf
Warning: `stat_contour()`: Zero contours were generated
Warning in min(x) : no non-missing arguments to min; returning Inf
Warning in max(x) : no non-missing arguments to max; returning -Inf
Warning in system(paste(shQuote(texi2dvi), if (quiet) "--quiet" else "",  :
  running command '"C:\PROGRA~1\MiKTeX\miktex\bin\x64\texify.exe" --quiet --pdf "partDeriv.tex" ' had status 1
Error: processing vignette 'partDeriv.Rnw' failed with diagnostics:
Failed to locate 'texi2pdf' output file 'partDeriv.pdf' for vignette with name 'partDeriv' and engine 'utils::Sweave'. The following files exist in working directory 'D:\RCompile\CRANpkg\local\4.7\interp.Rcheck\vign_test\interp\vignettes': 'Rplots.pdf' (352256 bytes), 'fig--003.pdf' (8048 bytes), 'fig--005.pdf' (42038 bytes), 'fig--007.pdf' (51025 bytes), 'fig--009.pdf' (52146 bytes), 'fig--011.pdf' (15256 bytes), 'fig--013.pdf' (7525 bytes), 'fig--024.pdf' (55199 bytes), 'fig--028.pdf' (71052 bytes), 'fig--036.pdf' (54205 bytes), 'fig--042.pdf' (80364 bytes), 'fig--046.pdf' (105460 bytes), 'fig--050.pdf' (100380 bytes), 'interp.Rnw' (28637 bytes), 'interp.aux' (3631 bytes), 'interp.bbl' (3979 bytes), 'interp.blg' (1155 bytes), 'interp.lof' (670 bytes), 'interp.log' (40609 bytes), 'interp.out' (1391 bytes), 'interp.pdf' (587009 bytes), 'interp.tex' (29003 bytes), 'lit.bib' (7342 bytes), 'partDeriv.Rnw' (42811 bytes), 'partDeriv.tex' (37294 bytes), 'tri.Rnw' (15135 bytes)
--- failed re-building 'partDeriv.Rnw'

--- re-building 'tri.Rnw' using Sweave
Bibliography warnings for 'tri':
empty journal in sinclair:16
--- finished re-building 'tri.Rnw'

SUMMARY: processing the following file failed:
  'partDeriv.Rnw'

Error: Vignette re-building failed.
Execution halted