Error(s) in re-building vignettes:
  ...
--- re-building ‘dental.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/munsellinterpol.Rcheck/vign_test/munsellinterpol/vignettes/dental_files/figure-html/unnamed-chunk-3-1.png
691x499 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 15465 bytes
Input file size = 15555 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 14964
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5		IDAT size = 14331
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 5		IDAT size = 14331

Output IDAT size = 14331 bytes (1134 bytes decrease)
Output file size = 14409 bytes (1146 bytes = 7.37% decrease)

--- finished re-building ‘dental.Rmd’

--- re-building ‘munsellinterpol-guide.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/munsellinterpol.Rcheck/vign_test/munsellinterpol/vignettes/munsellinterpol-guide_files/figure-html/unnamed-chunk-3-1.png
672x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 40671 bytes
Input file size = 40797 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 31109
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 31109

Output IDAT size = 31109 bytes (9562 bytes decrease)
Output file size = 31187 bytes (9610 bytes = 23.56% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/munsellinterpol.Rcheck/vign_test/munsellinterpol/vignettes/munsellinterpol-guide_files/figure-html/unnamed-chunk-4-1.png
672x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 32135 bytes
Input file size = 32249 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 25444
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 25444

Output IDAT size = 25444 bytes (6691 bytes decrease)
Output file size = 25522 bytes (6727 bytes = 20.86% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/munsellinterpol.Rcheck/vign_test/munsellinterpol/vignettes/munsellinterpol-guide_files/figure-html/unnamed-chunk-5-1.png
672x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 156153 bytes
Input file size = 156459 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 112001
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 112001

Output IDAT size = 112001 bytes (44152 bytes decrease)
Output file size = 112079 bytes (44380 bytes = 28.37% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/munsellinterpol.Rcheck/vign_test/munsellinterpol/vignettes/munsellinterpol-guide_files/figure-html/unnamed-chunk-6-1.png
672x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 134227 bytes
Input file size = 134497 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 96460
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 96460

Output IDAT size = 96460 bytes (37767 bytes decrease)
Output file size = 96538 bytes (37959 bytes = 28.22% decrease)


Quitting from lines 253-270 [unnamed-chunk-9] (munsellinterpol-guide.Rmd)
Error: processing vignette 'munsellinterpol-guide.Rmd' failed with diagnostics:
there is no package called 'flextable'
--- failed re-building ‘munsellinterpol-guide.Rmd’

--- re-building ‘lightness.rnw’ using knitr
--- finished re-building ‘lightness.rnw’

--- re-building ‘lociHC.rnw’ using knitr
--- finished re-building ‘lociHC.rnw’

SUMMARY: processing the following file failed:
  ‘munsellinterpol-guide.Rmd’

Error: Vignette re-building failed.
Execution halted