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 = 31850 bytes
Input file size = 31964 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 26772
  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 = 26772

Output IDAT size = 26772 bytes (5078 bytes decrease)
Output file size = 26850 bytes (5114 bytes = 16.00% 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, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 5281 bytes
Input file size = 6139 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4591
  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 = 4591

Output IDAT size = 4591 bytes (690 bytes decrease)
Output file size = 4669 bytes (1470 bytes = 23.95% 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 = 9397 bytes
Input file size = 10267 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 8785
  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 = 8785

Output IDAT size = 8785 bytes (612 bytes decrease)
Output file size = 8863 bytes (1404 bytes = 13.67% 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 = 3696 bytes
Input file size = 4551 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 3248
  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 = 3248

Output IDAT size = 3248 bytes (448 bytes decrease)
Output file size = 3326 bytes (1225 bytes = 26.92% 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 = 33525 bytes
Input file size = 33651 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 27165
  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 = 27165

Output IDAT size = 27165 bytes (6360 bytes decrease)
Output file size = 27243 bytes (6408 bytes = 19.04% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/glmtree.Rcheck/vign_test/glmtree/vignettes/glmtree_files/figure-html/segmentation_simulation2-2.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 29955 bytes
Input file size = 30069 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 24185
  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 = 24185

Output IDAT size = 24185 bytes (5770 bytes decrease)
Output file size = 24263 bytes (5806 bytes = 19.31% 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 = 29618 bytes
Input file size = 29732 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 24349
  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 = 24349

Output IDAT size = 24349 bytes (5269 bytes decrease)
Output file size = 24427 bytes (5305 bytes = 17.84% 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