Error(s) in re-building vignettes:
  ...
--- re-building ‘wqtrends.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/wqtrends.Rcheck/vign_test/wqtrends/vignettes/wqtrends_files/figure-html/unnamed-chunk-5-1.png
576x480 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 130671 bytes
Input file size = 130929 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 111952
  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 = 111952

Output IDAT size = 111952 bytes (18719 bytes decrease)
Output file size = 112030 bytes (18899 bytes = 14.43% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/wqtrends.Rcheck/vign_test/wqtrends/vignettes/wqtrends_files/figure-html/unnamed-chunk-6-1.png
576x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 65010 bytes
Input file size = 65172 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 58457
  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 = 58457

Output IDAT size = 58457 bytes (6553 bytes decrease)
Output file size = 58535 bytes (6637 bytes = 10.18% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/wqtrends.Rcheck/vign_test/wqtrends/vignettes/wqtrends_files/figure-html/unnamed-chunk-7-1.png
576x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 99139 bytes
Input file size = 99361 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 84791
  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 = 84791

Output IDAT size = 84791 bytes (14348 bytes decrease)
Output file size = 84869 bytes (14492 bytes = 14.59% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/wqtrends.Rcheck/vign_test/wqtrends/vignettes/wqtrends_files/figure-html/unnamed-chunk-10-1.png
864x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 73017 bytes
Input file size = 73191 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 65068
  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 = 65068

Output IDAT size = 65068 bytes (7949 bytes decrease)
Output file size = 65146 bytes (8045 bytes = 10.99% decrease)


Quitting from lines 131-132 [unnamed-chunk-13] (wqtrends.Rmd)
Error: processing vignette 'wqtrends.Rmd' failed with diagnostics:
could not open file '/home/hornik/tmp/scratch/RtmpI6lWgX/file3725e157a5901c'
--- failed re-building ‘wqtrends.Rmd’

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

Error: Vignette re-building failed.
Execution halted