Error(s) in re-building vignettes:
  ...
--- re-building ‘cubar.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/cubar.Rcheck/vign_test/cubar/vignettes/cubar_files/figure-html/unnamed-chunk-5-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 36504 bytes
Input file size = 36630 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 27455
  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 = 27455

Output IDAT size = 27455 bytes (9049 bytes decrease)
Output file size = 27533 bytes (9097 bytes = 24.83% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/cubar.Rcheck/vign_test/cubar/vignettes/cubar_files/figure-html/unnamed-chunk-6-1.png
288x288 pixels, 8 bits/pixel, 241 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 3431 bytes
Input file size = 4244 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 3079
  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 = 3079

Output IDAT size = 3079 bytes (352 bytes decrease)
Output file size = 3157 bytes (1087 bytes = 25.61% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/cubar.Rcheck/vign_test/cubar/vignettes/cubar_files/figure-html/unnamed-chunk-7-1.png
288x288 pixels, 8 bits/pixel, 241 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 3340 bytes
Input file size = 4153 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 2981
  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 = 2981

Output IDAT size = 2981 bytes (359 bytes decrease)
Output file size = 3059 bytes (1094 bytes = 26.34% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/cubar.Rcheck/vign_test/cubar/vignettes/cubar_files/figure-html/unnamed-chunk-9-1.png
288x288 pixels, 8 bits/pixel, 243 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 3321 bytes
Input file size = 4140 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 2869
  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 = 2869

Output IDAT size = 2869 bytes (452 bytes decrease)
Output file size = 2947 bytes (1193 bytes = 28.82% decrease)

trying URL 'http://gtrnadb.ucsc.edu/genomes/eukaryota/Scere3/sacCer3-mature-tRNAs.fa'

Quitting from lines 114-126 [unnamed-chunk-10] (cubar.Rmd)
Error: processing vignette 'cubar.Rmd' failed with diagnostics:
cannot open URL 'http://gtrnadb.ucsc.edu/genomes/eukaryota/Scere3/sacCer3-mature-tRNAs.fa'
--- failed re-building ‘cubar.Rmd’

--- re-building ‘non_standard_genetic_code.Rmd’ using rmarkdown
--- finished re-building ‘non_standard_genetic_code.Rmd’

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

Error: Vignette re-building failed.
Execution halted