Error(s) in re-building vignettes:
  ...
--- re-building ‘csquares-objects.Rmd’ using rmarkdown
--- finished re-building ‘csquares-objects.Rmd’

--- re-building ‘ices.Rmd’ using rmarkdown

Quitting from lines 43-59 [ices_plot] (ices.Rmd)
Error: processing vignette 'ices.Rmd' failed with diagnostics:
there is no package called 'rnaturalearth'
--- failed re-building ‘ices.Rmd’

--- re-building ‘tidy.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/csquares.Rcheck/vign_test/csquares/vignettes/tidy_files/figure-html/mutate-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 12504 bytes
Input file size = 12594 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 10378
  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 = 10378

Output IDAT size = 10378 bytes (2126 bytes decrease)
Output file size = 10456 bytes (2138 bytes = 16.98% decrease)

--- finished re-building ‘tidy.Rmd’

--- re-building ‘wildcards.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/csquares.Rcheck/vign_test/csquares/vignettes/wildcards_files/figure-html/filter-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 33104 bytes
Input file size = 33230 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 24491
  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 = 24491

Output IDAT size = 24491 bytes (8613 bytes decrease)
Output file size = 24569 bytes (8661 bytes = 26.06% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/csquares.Rcheck/vign_test/csquares/vignettes/wildcards_files/figure-html/filter-2.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 11926 bytes
Input file size = 12016 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 8706
  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 = 8706

Output IDAT size = 8706 bytes (3220 bytes decrease)
Output file size = 8784 bytes (3232 bytes = 26.90% decrease)

--- finished re-building ‘wildcards.Rmd’

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

Error: Vignette re-building failed.
Execution halted