Error(s) in re-building vignettes:
  ...
--- re-building ‘glmtree.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-release-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 = 30610 bytes
Input file size = 30724 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 25546
  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 = 25546

Output IDAT size = 25546 bytes (5064 bytes decrease)
Output file size = 25624 bytes (5100 bytes = 16.60% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/glmtree.Rcheck/vign_test/glmtree/vignettes/glmtree_files/figure-html/segmentation_mob1-1.png
288x288 pixels, 8 bits/pixel, 241 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 2494 bytes
Input file size = 3307 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 2147
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 2129
  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 = 2129

Output IDAT size = 2129 bytes (365 bytes decrease)
Output file size = 2207 bytes (1100 bytes = 33.26% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-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 = 5237 bytes
Input file size = 6095 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4554
  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 = 4554

Output IDAT size = 4554 bytes (683 bytes decrease)
Output file size = 4632 bytes (1463 bytes = 24.00% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-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 = 9020 bytes
Input file size = 9890 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 8387
  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 = 8387

Output IDAT size = 8387 bytes (633 bytes decrease)
Output file size = 8465 bytes (1425 bytes = 14.41% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-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 = 3702 bytes
Input file size = 4557 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 3247
  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 = 3247

Output IDAT size = 3247 bytes (455 bytes decrease)
Output file size = 3325 bytes (1232 bytes = 27.04% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-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 = 30607 bytes
Input file size = 30721 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 25106
  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 = 25106

Output IDAT size = 25106 bytes (5501 bytes decrease)
Output file size = 25184 bytes (5537 bytes = 18.02% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-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 = 28803 bytes
Input file size = 28917 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 23389
  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 = 23389

Output IDAT size = 23389 bytes (5414 bytes decrease)
Output file size = 23467 bytes (5450 bytes = 18.85% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-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 = 27593 bytes
Input file size = 27707 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 22642
  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 = 22642

Output IDAT size = 22642 bytes (4951 bytes decrease)
Output file size = 22720 bytes (4987 bytes = 18.00% decrease)


Quitting from lines 108-120 [segmentation_pca2] (glmtree.Rmd)
Error: processing vignette 'glmtree.Rmd' failed with diagnostics:
factor x1 has new levels 3
--- failed re-building ‘glmtree.Rmd’

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

Error: Vignette re-building failed.
Execution halted