Errors in running code in vignettes:
when running code in 'raschtree.Rnw'

> options(prompt = "R> ", continue = "+  ")

> library("psychotree")
Loading required package: partykit
Loading required package: grid
Loading required package: libcoin
Loading required package: mvtnorm
Loading required package: psychotools

> data("SPISA", package = "psychotree")

> if (file.exists("raschtree-spisa.rda")) load("raschtree-spisa.rda") else {
+     my_first_raschtree <- raschtree(spisa ~ age + gender + semester + 
 .... [TRUNCATED] 

> file.remove("raschtree-spisa.rda")
[1] TRUE

> plot(my_first_raschtree)

> plot(my_first_raschtree, col = rep(palette.colors(5), 
+     each = 9))

> coef(my_first_raschtree, node = 4)
    spisa2     spisa3     spisa4     spisa5     spisa6     spisa7     spisa8 
-0.9187137 -1.2874521 -2.6805353 -1.8312493 -1.9026320 -2.4951461 -0.4162699 
    spisa9    spisa10    spisa11    spisa12    spisa13    spisa14    spisa15 
-0.2581010 -2.7296693 -1.1543021 -4.1769262 -1.0539421  0.7916895 -2.3241647 
   spisa16    spisa17    spisa18    spisa19    spisa20    spisa21    spisa22 
-2.0495272 -0.8845425 -1.4541652  1.0321505 -0.9187137 -1.2208998 -2.2428880 
   spisa23    spisa24    spisa25    spisa26    spisa27    spisa28    spisa29 
-1.3540086 -2.7296693 -0.7458437 -1.2208998 -2.9403761 -2.1253688 -0.7458437 
   spisa30    spisa31    spisa32    spisa33    spisa34    spisa35    spisa36 
-0.9865644 -1.4541652 -0.4922363 -3.8232693 -2.1640318 -3.2469996 -2.9403761 
   spisa37    spisa38    spisa39    spisa40    spisa41    spisa42    spisa43 
-2.9972355 -1.9026320 -0.8845425 -3.8232693 -1.0539421 -2.7296693 -3.2469996 
   spisa44    spisa45 
-1.5213581 -3.6324888 

> itempar(my_first_raschtree, node = 4)
     spisa1      spisa2      spisa3      spisa4      spisa5      spisa6 
 1.75417311  0.83545944  0.46672105 -0.92636220 -0.07707618 -0.14845889 
     spisa7      spisa8      spisa9     spisa10     spisa11     spisa12 
-0.74097296  1.33790319  1.49607208 -0.97549614  0.59987100 -2.42275309 
    spisa13     spisa14     spisa15     spisa16     spisa17     spisa18 
 0.70023103  2.54586259 -0.56999156 -0.29535409  0.86963065  0.30000788 
    spisa19     spisa20     spisa21     spisa22     spisa23     spisa24 
 2.78632359  0.83545944  0.53327329 -0.48871486  0.40016448 -0.97549614 
    spisa25     spisa26     spisa27     spisa28     spisa29     spisa30 
 1.00832941  0.53327329 -1.18620295 -0.37119569  1.00832941  0.76760868 
    spisa31     spisa32     spisa33     spisa34     spisa35     spisa36 
 0.30000788  1.26193682 -2.06909621 -0.40985866 -1.49282653 -1.18620295 
    spisa37     spisa38     spisa39     spisa40     spisa41     spisa42 
-1.24306243 -0.14845889  0.86963065 -2.06909621  0.70023103 -0.97549614 
    spisa43     spisa44     spisa45 
-1.49282653  0.23281497 -1.87831571 

> if (require("stablelearner", quietly = TRUE)) {
+     if (!file.exists("my_first_raschtree_st.Rdata")) {
+         set.seed(4321)
+         my_first .... [TRUNCATED] 

> summary(my_first_raschtree_st)

Call:
raschtree(formula = spisa ~ age + gender + semester + elite + 
    spon, data = SPISA, minsize = 30)

Sampler:
B = 50 
Method = Subsampling with 63.2% data

Variable selection overview:

         freq * mean *
gender   1.00 1 1.00 1
spon     0.60 1 0.82 2
semester 0.18 0 0.18 0
age      0.04 0 0.04 0
elite    0.02 0 0.02 0
(* = original tree)

> barplot(my_first_raschtree_st)

> image(my_first_raschtree_st)

> plot(my_first_raschtree_st)

 *** Run successfully completed ***
> proc.time()
   user  system elapsed 
  91.57   10.01  138.14 

... incomplete output.  Crash?

  'raschtree.Rnw' using 'UTF-8'... failed to complete the test