Error(s) in re-building vignettes:
  ...
--- re-building ‘diagnostics.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/rprev.Rcheck/vign_test/rprev/vignettes/diagnostics_files/figure-html/unnamed-chunk-3-1.png
672x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 32136 bytes
Input file size = 32250 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 25816
  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 = 25816

Output IDAT size = 25816 bytes (6320 bytes decrease)
Output file size = 25894 bytes (6356 bytes = 19.71% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/rprev.Rcheck/vign_test/rprev/vignettes/diagnostics_files/figure-html/incidenceage-1.png
672x384 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 10174 bytes
Input file size = 11044 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 8346
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 8317
  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 = 1  f = 0		IDAT size = 8317

Output IDAT size = 8317 bytes (1857 bytes decrease)
Output file size = 8395 bytes (2649 bytes = 23.99% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/rprev.Rcheck/vign_test/rprev/vignettes/diagnostics_files/figure-html/survivaldiag-1.png
672x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 22632 bytes
Input file size = 22734 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 17721
  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 = 17721

Output IDAT size = 17721 bytes (4911 bytes decrease)
Output file size = 17799 bytes (4935 bytes = 21.71% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/rprev.Rcheck/vign_test/rprev/vignettes/diagnostics_files/figure-html/survivaldiag2-1.png
672x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 30731 bytes
Input file size = 30845 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 23109
  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 = 23109

Output IDAT size = 23109 bytes (7622 bytes decrease)
Output file size = 23187 bytes (7658 bytes = 24.83% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/rprev.Rcheck/vign_test/rprev/vignettes/diagnostics_files/figure-html/survivaldiag4-1.png
672x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 27542 bytes
Input file size = 27656 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 22064
  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 = 22064

Output IDAT size = 22064 bytes (5478 bytes decrease)
Output file size = 22142 bytes (5514 bytes = 19.94% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/rprev.Rcheck/vign_test/rprev/vignettes/diagnostics_files/figure-html/survivaldiag3-1.png
672x384 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 38093 bytes
Input file size = 38999 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 36717
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 36365
  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 = 1  f = 0		IDAT size = 36365

Output IDAT size = 36365 bytes (1728 bytes decrease)
Output file size = 36443 bytes (2556 bytes = 6.55% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/rprev.Rcheck/vign_test/rprev/vignettes/diagnostics_files/figure-html/ageform3-1.png
672x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 20595 bytes
Input file size = 20697 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 19705
  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 = 18989
  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 = 18989

Output IDAT size = 18989 bytes (1606 bytes decrease)
Output file size = 19067 bytes (1630 bytes = 7.88% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/rprev.Rcheck/vign_test/rprev/vignettes/diagnostics_files/figure-html/unnamed-chunk-9-1.png
672x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 20993 bytes
Input file size = 21095 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 16911
  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 = 16911

Output IDAT size = 16911 bytes (4082 bytes decrease)
Output file size = 16989 bytes (4106 bytes = 19.46% decrease)

--- finished re-building ‘diagnostics.Rmd’

--- re-building ‘user_guide.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/rprev.Rcheck/vign_test/rprev/vignettes/user_guide_files/figure-html/basicsurvival-1.png
672x384 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 23071 bytes
Input file size = 23173 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 19055
  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 = 19055

Output IDAT size = 19055 bytes (4016 bytes decrease)
Output file size = 19133 bytes (4040 bytes = 17.43% decrease)


Quitting from lines 117-119 [unnamed-chunk-7] (user_guide.Rmd)
Error: processing vignette 'user_guide.Rmd' failed with diagnostics:
there is no package called 'flexsurv'
--- failed re-building ‘user_guide.Rmd’

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

Error: Vignette re-building failed.
Execution halted