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

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

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

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

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

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

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

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

--- re-building ‘plot_interactions.Rmd’ using rmarkdown
** Processing: /data/gannet/ripley/R/packages/tests-devel/modsem.Rcheck/vign_test/modsem/vignettes/plot_interactions_files/figure-html/unnamed-chunk-2-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 24412 bytes
Input file size = 24514 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 18217
  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 = 18217

Output IDAT size = 18217 bytes (6195 bytes decrease)
Output file size = 18295 bytes (6219 bytes = 25.37% decrease)

** Processing: /data/gannet/ripley/R/packages/tests-devel/modsem.Rcheck/vign_test/modsem/vignettes/plot_interactions_files/figure-html/unnamed-chunk-3-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 16433 bytes
Input file size = 16535 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 12969
  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 = 12969

Output IDAT size = 12969 bytes (3464 bytes decrease)
Output file size = 13047 bytes (3488 bytes = 21.09% decrease)

** Processing: /data/gannet/ripley/R/packages/tests-devel/modsem.Rcheck/vign_test/modsem/vignettes/plot_interactions_files/figure-html/unnamed-chunk-4-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 19176 bytes
Input file size = 19278 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 14322
  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 = 14322

Output IDAT size = 14322 bytes (4854 bytes decrease)
Output file size = 14400 bytes (4878 bytes = 25.30% decrease)

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

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

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

Error: Vignette re-building failed.
Execution halted