Error(s) in re-building vignettes:
  ...
--- re-building ‘SITH.Rmd’ using rmarkdown
Warning in snapshot3d(paste0(name, ".png")) :
  webshot = TRUE requires the webshot2 package and Chrome browser; using rgl.snapshot() instead
Warning in snapshot3d(paste0(name, ".png")) :
  webshot = TRUE requires the webshot2 package and Chrome browser; using rgl.snapshot() instead
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/SITH.Rcheck/vign_test/SITH/vignettes/SITH_files/figure-html/unnamed-chunk-7-1.png
720x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 40457 bytes
Input file size = 40583 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 26819
  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 = 26819

Output IDAT size = 26819 bytes (13638 bytes decrease)
Output file size = 26897 bytes (13686 bytes = 33.72% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/SITH.Rcheck/vign_test/SITH/vignettes/SITH_files/figure-html/unnamed-chunk-8-1.png
720x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 48614 bytes
Input file size = 48752 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 38430
  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 = 38430

Output IDAT size = 38430 bytes (10184 bytes decrease)
Output file size = 38508 bytes (10244 bytes = 21.01% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/SITH.Rcheck/vign_test/SITH/vignettes/SITH_files/figure-html/unnamed-chunk-16-1.png
720x576 pixels, 8 bits/pixel, 229 colors in palette
Input IDAT size = 4681 bytes
Input file size = 5458 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 3979
  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 = 3979

Output IDAT size = 3979 bytes (702 bytes decrease)
Output file size = 4756 bytes (702 bytes = 12.86% decrease)


Quitting from lines 296-304 [unnamed-chunk-17] (SITH.Rmd)
Error: processing vignette 'SITH.Rmd' failed with diagnostics:
igraph needed to compile the vignette.
--- failed re-building ‘SITH.Rmd’

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

Error: Vignette re-building failed.
Execution halted