* using log directory ‘/srv/hornik/tmp/CRAN_pretest/mlr3cluster.Rcheck’
* using R Under development (unstable) (2025-11-19 r89037)
* using platform: x86_64-pc-linux-gnu
* R was compiled by
    Debian clang version 21.1.5 (1)
    Debian flang version 21.1.5 (1)
* running under: Debian GNU/Linux forky/sid
* using session charset: UTF-8
* checking for file ‘mlr3cluster/DESCRIPTION’ ... OK
* this is package ‘mlr3cluster’ version ‘0.1.12’
* package encoding: UTF-8
* checking CRAN incoming feasibility ... [5s/7s] OK
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for executable files ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking for sufficient/correct file permissions ... OK
* checking serialization versions ... OK
* checking whether package ‘mlr3cluster’ can be installed ... [12s/12s] OK
* checking package directory ... OK
* checking for future file timestamps ... OK
* checking DESCRIPTION meta-information ... OK
* checking top-level files ... OK
* checking for left-over files ... OK
* checking index information ... OK
* checking package subdirectories ... OK
* checking code files for non-ASCII characters ... OK
* checking R files for syntax errors ... OK
* checking whether the package can be loaded ... [1s/1s] OK
* checking whether the package can be loaded with stated dependencies ... [1s/1s] OK
* checking whether the package can be unloaded cleanly ... [1s/1s] OK
* checking whether the namespace can be loaded with stated dependencies ... [1s/1s] OK
* checking whether the namespace can be unloaded cleanly ... [1s/1s] OK
* checking loading without being on the library search path ... [1s/1s] OK
* checking whether startup messages can be suppressed ... [1s/1s] OK
* checking use of S3 registration ... OK
* checking dependencies in R code ... OK
* checking S3 generic/method consistency ... OK
* checking replacement functions ... OK
* checking foreign function calls ... OK
* checking R code for possible problems ... [7s/7s] OK
* checking Rd files ... [1s/1s] OK
* checking Rd metadata ... OK
* checking Rd line widths ... OK
* checking Rd cross-references ... OK
* checking for missing documentation entries ... OK
* checking for code/documentation mismatches ... OK
* checking Rd \usage sections ... OK
* checking Rd contents ... OK
* checking for unstated dependencies in examples ... OK
* checking examples ... [14s/14s] ERROR
Running examples in ‘mlr3cluster-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: mlr_learners_clust.xmeans
> ### Title: X-means Clustering Learner
> ### Aliases: mlr_learners_clust.xmeans LearnerClustXMeans
> 
> ### ** Examples
> 
> ## Don't show: 
> if (mlr3misc::require_namespaces(lrn("clust.xmeans")$packages, quietly = TRUE)) withAutoprint({ # examplesIf
+ ## End(Don't show)
+ # Define the Learner and set parameter values
+ learner = lrn("clust.xmeans")
+ print(learner)
+ 
+ # Define a Task
+ task = tsk("usarrests")
+ 
+ # Train the learner on the task
+ learner$train(task)
+ 
+ # Print the model
+ print(learner$model)
+ 
+ # Make predictions for the task
+ prediction = learner$predict(task)
+ 
+ # Score the predictions
+ prediction$score(task = task)
+ ## Don't show: 
+ }) # examplesIf
> learner = lrn("clust.xmeans")
> print(learner)

── <LearnerClustXMeans> (clust.xmeans): X-means ────────────────────────────────
• Model: -
• Parameters: list()
• Packages: mlr3, mlr3cluster, and RWeka
• Predict Types: [partition]
• Feature Types: logical, integer, and numeric
• Encapsulation: none (fallback: -)
• Properties: complete, exclusive, and partitional
• Other settings: use_weights = 'error'
> task = tsk("usarrests")
> learner$train(task)
Error in WPM(".check-installed-and-load", package) : 
  Required Weka package 'XMeans' is not installed.
Calls: withAutoprint ... <Anonymous> -> .structure -> RWeka_build_clusterer -> WPM
Execution halted
* checking for unstated dependencies in ‘tests’ ... OK
* checking tests ... [15s/15s] OK
  Running ‘testthat.R’ [15s/14s]
* checking PDF version of manual ... [5s/5s] OK
* checking HTML version of manual ... [4s/4s] OK
* checking for non-standard things in the check directory ... OK
* checking for detritus in the temp directory ... OK
* DONE
Status: 1 ERROR