Error(s) in re-building vignettes:
  ...
--- re-building ‘examples.Rmd’ using rmarkdown
--- finished re-building ‘examples.Rmd’

--- re-building ‘labels-support.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/expss.Rcheck/vign_test/expss/vignettes/labels-support_files/figure-html/unnamed-chunk-5-1.png
1344x1152 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 16048 bytes
Input file size = 16918 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 12842
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 12830
  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 = 11300
  zc = 9  zm = 8  zs = 1  f = 5		IDAT size = 11261
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 1  f = 5		IDAT size = 11261

Output IDAT size = 11261 bytes (4787 bytes decrease)
Output file size = 11339 bytes (5579 bytes = 32.98% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/expss.Rcheck/vign_test/expss/vignettes/labels-support_files/figure-html/unnamed-chunk-6-1.png
1344x960 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 15149 bytes
Input file size = 16019 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 12652
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 12617
  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 = 1  f = 0		IDAT size = 12617

Output IDAT size = 12617 bytes (2532 bytes decrease)
Output file size = 12695 bytes (3324 bytes = 20.75% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/expss.Rcheck/vign_test/expss/vignettes/labels-support_files/figure-html/unnamed-chunk-7-1.png
1344x1152 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 70796 bytes
Input file size = 70970 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 66182
  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 = 64937
  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 = 64937

Output IDAT size = 64937 bytes (5859 bytes decrease)
Output file size = 65015 bytes (5955 bytes = 8.39% decrease)

--- finished re-building ‘labels-support.Rmd’

--- re-building ‘tables-with-labels.Rmd’ using rmarkdown
--- finished re-building ‘tables-with-labels.Rmd’

--- re-building ‘xlsx-export.Rmd’ using rmarkdown

Quitting from lines 20-49 [unnamed-chunk-1] (xlsx-export.Rmd)
Error: processing vignette 'xlsx-export.Rmd' failed with diagnostics:
there is no package called 'openxlsx'
--- failed re-building ‘xlsx-export.Rmd’

SUMMARY: processing the following file failed:
  ‘xlsx-export.Rmd’

Error: Vignette re-building failed.
Execution halted