Error(s) in re-building vignettes:
  ...
--- re-building ‘spat-feateng.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/ptools.Rcheck/vign_test/ptools/vignettes/spat-feateng_files/figure-html/unnamed-chunk-2-1.png
576x576 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 21934 bytes
Input file size = 22816 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 19873
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 19747
  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 = 19747

Output IDAT size = 19747 bytes (2187 bytes decrease)
Output file size = 19825 bytes (2991 bytes = 13.11% decrease)

** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/ptools.Rcheck/vign_test/ptools/vignettes/spat-feateng_files/figure-html/unnamed-chunk-3-1.png
576x576 pixels, 8 bits/pixel, 106 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 5290 bytes
Input file size = 5698 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4451
  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 = 4451

Output IDAT size = 4451 bytes (839 bytes decrease)
Output file size = 4529 bytes (1169 bytes = 20.52% decrease)

** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/ptools.Rcheck/vign_test/ptools/vignettes/spat-feateng_files/figure-html/unnamed-chunk-4-1.png
576x576 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 15851 bytes
Input file size = 16721 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 14477
  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 = 14477

Output IDAT size = 14477 bytes (1374 bytes decrease)
Output file size = 14555 bytes (2166 bytes = 12.95% decrease)

** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/ptools.Rcheck/vign_test/ptools/vignettes/spat-feateng_files/figure-html/unnamed-chunk-5-1.png
576x576 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 10206 bytes
Input file size = 11076 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 9084
  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 = 9084

Output IDAT size = 9084 bytes (1122 bytes decrease)
Output file size = 9162 bytes (1914 bytes = 17.28% decrease)

** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/ptools.Rcheck/vign_test/ptools/vignettes/spat-feateng_files/figure-html/unnamed-chunk-6-1.png
576x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 104175 bytes
Input file size = 104397 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 72880
  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 = 72880

Output IDAT size = 72880 bytes (31295 bytes decrease)
Output file size = 72958 bytes (31439 bytes = 30.11% decrease)

** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/ptools.Rcheck/vign_test/ptools/vignettes/spat-feateng_files/figure-html/unnamed-chunk-7-1.png
576x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 93370 bytes
Input file size = 93580 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 65854
  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 = 65854

Output IDAT size = 65854 bytes (27516 bytes decrease)
Output file size = 65932 bytes (27648 bytes = 29.54% decrease)


Quitting from lines 99-110 [unnamed-chunk-8] (spat-feateng.Rmd)
Error: processing vignette 'spat-feateng.Rmd' failed with diagnostics:
invalid 'row.names' length
--- failed re-building ‘spat-feateng.Rmd’

SUMMARY: processing the following file failed:
  ‘spat-feateng.Rmd’

Error: Vignette re-building failed.
Execution halted