Error(s) in re-building vignettes:
  ...
--- re-building ‘glmtree.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/glmtree.Rcheck/vign_test/glmtree/vignettes/glmtree_files/figure-html/segmentation_simulation1-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 31207 bytes
Input file size = 31321 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 26381
  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 = 26381

Output IDAT size = 26381 bytes (4826 bytes decrease)
Output file size = 26459 bytes (4862 bytes = 15.52% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/glmtree.Rcheck/vign_test/glmtree/vignettes/glmtree_files/figure-html/segmentation_mob1-1.png
288x288 pixels, 8 bits/pixel, 239 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 2492 bytes
Input file size = 3299 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 2141
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 2124
  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 = 2124

Output IDAT size = 2124 bytes (368 bytes decrease)
Output file size = 2202 bytes (1097 bytes = 33.25% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/glmtree.Rcheck/vign_test/glmtree/vignettes/glmtree_files/figure-html/segmentation_glmtree1-1.png
288x288 pixels, 8 bits/pixel, 255 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 5048 bytes
Input file size = 5903 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4357
  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 = 4357

Output IDAT size = 4357 bytes (691 bytes decrease)
Output file size = 4435 bytes (1468 bytes = 24.87% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/glmtree.Rcheck/vign_test/glmtree/vignettes/glmtree_files/figure-html/segmentation_glmtree1-2.png
288x288 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 9305 bytes
Input file size = 10175 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 8641
  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 = 8641

Output IDAT size = 8641 bytes (664 bytes decrease)
Output file size = 8719 bytes (1456 bytes = 14.31% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/glmtree.Rcheck/vign_test/glmtree/vignettes/glmtree_files/figure-html/segmentation_glmtree1-3.png
288x288 pixels, 8 bits/pixel, 255 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 3697 bytes
Input file size = 4552 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 3243
  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 = 3243

Output IDAT size = 3243 bytes (454 bytes decrease)
Output file size = 3321 bytes (1231 bytes = 27.04% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/glmtree.Rcheck/vign_test/glmtree/vignettes/glmtree_files/figure-html/segmentation_simulation2-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 31168 bytes
Input file size = 31282 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 25349
  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 = 25349

Output IDAT size = 25349 bytes (5819 bytes decrease)
Output file size = 25427 bytes (5855 bytes = 18.72% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/glmtree.Rcheck/vign_test/glmtree/vignettes/glmtree_files/figure-html/segmentation_simulation2-2.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 32039 bytes
Input file size = 32153 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 25394
  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 = 25394

Output IDAT size = 25394 bytes (6645 bytes decrease)
Output file size = 25472 bytes (6681 bytes = 20.78% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/glmtree.Rcheck/vign_test/glmtree/vignettes/glmtree_files/figure-html/segmentation_simulation2-3.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 34362 bytes
Input file size = 34488 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 27426
  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 = 27426

Output IDAT size = 27426 bytes (6936 bytes decrease)
Output file size = 27504 bytes (6984 bytes = 20.25% decrease)


Quitting from lines 108-120 [segmentation_pca2] (glmtree.Rmd)
Error: processing vignette 'glmtree.Rmd' failed with diagnostics:
factor x1 has new levels 5
--- failed re-building ‘glmtree.Rmd’

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

Error: Vignette re-building failed.
Execution halted