Error(s) in re-building vignettes:
  ...
--- re-building ‘illustration.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/multimedia.Rcheck/vign_test/multimedia/vignettes/illustration_files/figure-html/sensitivity_analysis-1.png
288x288 pixels, 4x8 bits/pixel, RGB+alpha
Input IDAT size = 18750 bytes
Input file size = 18852 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 14880
  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 = 14880

Output IDAT size = 14880 bytes (3870 bytes decrease)
Output file size = 14958 bytes (3894 bytes = 20.66% decrease)


Quitting from lines 141-152 [unnamed-chunk-2] (illustration.Rmd)
Error: processing vignette 'illustration.Rmd' failed with diagnostics:
cannot open the connection
--- failed re-building ‘illustration.Rmd’

--- re-building ‘random.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/multimedia.Rcheck/vign_test/multimedia/vignettes/random_files/figure-html/graph-1.png
288x288 pixels, 4x8 bits/pixel, RGB+alpha
Input IDAT size = 22374 bytes
Input file size = 22476 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 19856
  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 = 19856

Output IDAT size = 19856 bytes (2518 bytes decrease)
Output file size = 19934 bytes (2542 bytes = 11.31% decrease)

--- finished re-building ‘random.Rmd’

SUMMARY: processing the following file failed:
  ‘illustration.Rmd’

Error: Vignette re-building failed.
Execution halted