Error(s) in re-building vignettes:
  ...
--- re-building ‘Change_in_Mean.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/memochange.Rcheck/vign_test/memochange/vignettes/Change_in_Mean_files/figure-html/unnamed-chunk-1-1.png
672x384 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 13537 bytes
Input file size = 14407 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 12462
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 12458
  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 = 12147
  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 = 12147

Output IDAT size = 12147 bytes (1390 bytes decrease)
Output file size = 12225 bytes (2182 bytes = 15.15% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/memochange.Rcheck/vign_test/memochange/vignettes/Change_in_Mean_files/figure-html/unnamed-chunk-3-1.png
672x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 17818 bytes
Input file size = 17920 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 14470
  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 = 14470

Output IDAT size = 14470 bytes (3348 bytes decrease)
Output file size = 14548 bytes (3372 bytes = 18.82% decrease)


Quitting from lines 99-108 [unnamed-chunk-6] (Change_in_Mean.Rmd)
Error: processing vignette 'Change_in_Mean.Rmd' failed with diagnostics:
replacement has 0 rows, data has 755
--- failed re-building ‘Change_in_Mean.Rmd’

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

Quitting from lines 45-49 [unnamed-chunk-2] (break_in_persistence.Rmd)
Error: processing vignette 'break_in_persistence.Rmd' failed with diagnostics:
replacement has 0 rows, data has 404
--- failed re-building ‘break_in_persistence.Rmd’

SUMMARY: processing the following files failed:
  ‘Change_in_Mean.Rmd’ ‘break_in_persistence.Rmd’

Error: Vignette re-building failed.
Execution halted