Error(s) in re-building vignettes:
--- re-building ‘graphlayouts.Rmd’ using rmarkdown
** Processing: /data/gannet/ripley/R/packages/tests-devel/graphlayouts.Rcheck/vign_test/graphlayouts/vignettes/graphlayouts_files/figure-html/example-1.png
672x672 pixels, 8 bits/pixel, 244 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 59401 bytes
Input file size = 60307 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 56657
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 55635
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0		IDAT size = 55281
  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 = 3  f = 0		IDAT size = 55281

Output IDAT size = 55281 bytes (4120 bytes decrease)
Output file size = 55359 bytes (4948 bytes = 8.20% decrease)

** Processing: /data/gannet/ripley/R/packages/tests-devel/graphlayouts.Rcheck/vign_test/graphlayouts/vignettes/graphlayouts_files/figure-html/example_un-1.png
672x672 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 34645 bytes
Input file size = 35551 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 32269
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 32055
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0		IDAT size = 30474
  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 = 3  f = 0		IDAT size = 30474

Output IDAT size = 30474 bytes (4171 bytes decrease)
Output file size = 30552 bytes (4999 bytes = 14.06% decrease)

** Processing: /data/gannet/ripley/R/packages/tests-devel/graphlayouts.Rcheck/vign_test/graphlayouts/vignettes/graphlayouts_files/figure-html/hairball-1.png
672x672 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 435110 bytes
Input file size = 435824 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 301439
  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 = 301439

Output IDAT size = 301439 bytes (133671 bytes decrease)
Output file size = 301517 bytes (134307 bytes = 30.82% decrease)


Quitting from lines 118-129 [backbone] (graphlayouts.Rmd)
Error: processing vignette 'graphlayouts.Rmd' failed with diagnostics:
oaqc is needed for this function to work. Please install it.
--- failed re-building ‘graphlayouts.Rmd’

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

Error: Vignette re-building failed.
Execution halted