Error(s) in re-building vignettes:
  ...
--- re-building ‘swdft-intro.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/swdft.Rcheck/vign_test/swdft/vignettes/swdft-intro_files/figure-html/unnamed-chunk-4-1.png
672x480 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 43302 bytes
Input file size = 43440 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 39957
  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 = 39957

Output IDAT size = 39957 bytes (3345 bytes decrease)
Output file size = 40035 bytes (3405 bytes = 7.84% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/swdft.Rcheck/vign_test/swdft/vignettes/swdft-intro_files/figure-html/unnamed-chunk-10-1.png
672x480 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 12732 bytes
Input file size = 13602 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 11485
  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 = 11485

Output IDAT size = 11485 bytes (1247 bytes decrease)
Output file size = 11563 bytes (2039 bytes = 14.99% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/swdft.Rcheck/vign_test/swdft/vignettes/swdft-intro_files/figure-html/unnamed-chunk-11-1.png
672x480 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 28367 bytes
Input file size = 28481 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 25446
  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 = 25446

Output IDAT size = 25446 bytes (2921 bytes decrease)
Output file size = 25524 bytes (2957 bytes = 10.38% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/swdft.Rcheck/vign_test/swdft/vignettes/swdft-intro_files/figure-html/unnamed-chunk-12-1.png
672x480 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 11585 bytes
Input file size = 12455 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 10474
  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 = 10433
  zc = 9  zm = 8  zs = 1  f = 5		IDAT size = 10366
  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 = 10366

Output IDAT size = 10366 bytes (1219 bytes decrease)
Output file size = 10444 bytes (2011 bytes = 16.15% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/swdft.Rcheck/vign_test/swdft/vignettes/swdft-intro_files/figure-html/unnamed-chunk-13-1.png
672x480 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 10650 bytes
Input file size = 11520 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 9492
  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 = 9249
  zc = 9  zm = 8  zs = 1  f = 5		IDAT size = 9183
  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 = 9183

Output IDAT size = 9183 bytes (1467 bytes decrease)
Output file size = 9261 bytes (2259 bytes = 19.61% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/swdft.Rcheck/vign_test/swdft/vignettes/swdft-intro_files/figure-html/unnamed-chunk-14-1.png
672x480 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 21645 bytes
Input file size = 21747 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 20361
  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 = 19582
  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 = 19582

Output IDAT size = 19582 bytes (2063 bytes decrease)
Output file size = 19660 bytes (2087 bytes = 9.60% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/swdft.Rcheck/vign_test/swdft/vignettes/swdft-intro_files/figure-html/unnamed-chunk-15-1.png
672x480 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 12343 bytes
Input file size = 13213 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 11362
  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 = 11362

Output IDAT size = 11362 bytes (981 bytes decrease)
Output file size = 11440 bytes (1773 bytes = 13.42% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/swdft.Rcheck/vign_test/swdft/vignettes/swdft-intro_files/figure-html/unnamed-chunk-16-1.png
672x480 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 13189 bytes
Input file size = 14059 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 12289
  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 = 12061
  zc = 9  zm = 8  zs = 1  f = 5		IDAT size = 11993
  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 = 11993

Output IDAT size = 11993 bytes (1196 bytes decrease)
Output file size = 12071 bytes (1988 bytes = 14.14% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/swdft.Rcheck/vign_test/swdft/vignettes/swdft-intro_files/figure-html/unnamed-chunk-17-1.png
672x480 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 53803 bytes
Input file size = 53953 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0
  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 = 49934
  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 = 49934

Output IDAT size = 49934 bytes (3869 bytes decrease)
Output file size = 50012 bytes (3941 bytes = 7.30% decrease)


Quitting from lines 303-306 [unnamed-chunk-21] (swdft-intro.Rmd)
Error: processing vignette 'swdft-intro.Rmd' failed with diagnostics:
there is no package called 'nloptr'
--- failed re-building ‘swdft-intro.Rmd’

SUMMARY: processing the following file failed:
  ‘swdft-intro.Rmd’

Error: Vignette re-building failed.
Execution halted