Error(s) in re-building vignettes:
--- re-building ‘bootCTvignette.Rmd’ using rmarkdown
** Processing: /data/gannet/ripley/R/packages/tests-clang/bootCT.Rcheck/vign_test/bootCT/vignettes/bootCTvignette_files/figure-html/unnamed-chunk-9-1.png
672x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 71454 bytes
Input file size = 71628 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 70393
  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 = 69837
  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 = 69837

Output IDAT size = 69837 bytes (1617 bytes decrease)
Output file size = 69915 bytes (1713 bytes = 2.39% decrease)

** Processing: /data/gannet/ripley/R/packages/tests-clang/bootCT.Rcheck/vign_test/bootCT/vignettes/bootCTvignette_files/figure-html/unnamed-chunk-9-2.png
672x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 68792 bytes
Input file size = 68966 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 = 67422
  zc = 9  zm = 8  zs = 1  f = 5		IDAT size = 67399
  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 = 67399

Output IDAT size = 67399 bytes (1393 bytes decrease)
Output file size = 67477 bytes (1489 bytes = 2.16% decrease)

** Processing: /data/gannet/ripley/R/packages/tests-clang/bootCT.Rcheck/vign_test/bootCT/vignettes/bootCTvignette_files/figure-html/unnamed-chunk-11-1.png
672x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 28399 bytes
Input file size = 28513 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 24016
  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 = 24016

Output IDAT size = 24016 bytes (4383 bytes decrease)
Output file size = 24094 bytes (4419 bytes = 15.50% decrease)

** Processing: /data/gannet/ripley/R/packages/tests-clang/bootCT.Rcheck/vign_test/bootCT/vignettes/bootCTvignette_files/figure-html/unnamed-chunk-11-2.png
672x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 42613 bytes
Input file size = 42751 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 36894
  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 = 36894

Output IDAT size = 36894 bytes (5719 bytes decrease)
Output file size = 36972 bytes (5779 bytes = 13.52% decrease)