Error(s) in re-building vignettes:
--- re-building ‘constparty.Rnw’ using Sweave
Loading required package: grid
Loading required package: libcoin
Loading required package: mvtnorm
Loading required package: RWeka
Loading required namespace: XML
Loading required package: XML
--- finished re-building ‘constparty.Rnw’

--- re-building ‘ctree.Rnw’ using Sweave
Loading required package: partykit
Loading required package: grid
Loading required package: libcoin
Loading required package: mvtnorm
Loading required package: coin
Loading required package: survival
Loading required package: strucchange
Loading required package: zoo

Attaching package: ‘zoo’

The following objects are masked from ‘package:base’:

    as.Date, as.Date.numeric

Loading required package: sandwich
Loading required package: Formula
Loading required package: modeltools
Loading required package: stats4

Attaching package: ‘party’

The following objects are masked from ‘package:partykit’:

    cforest, ctree, ctree_control, edge_simple, mob,
    mob_control, node_barplot, node_bivplot, node_boxplot,
    node_inner, node_surv, node_terminal, varimp


Error: processing vignette 'ctree.Rnw' failed with diagnostics:
 chunk 51 (label = nf-cluster) 
Error in if (all(lev$Variance < ctrl$tol)) { : 
  missing value where TRUE/FALSE needed

--- failed re-building ‘ctree.Rnw’

--- re-building ‘mob.Rnw’ using Sweave
Loading required package: grid
Loading required package: libcoin
Loading required package: mvtnorm
Loading required namespace: vcd
Loading required package: zoo

Attaching package: 'zoo'

The following objects are masked from 'package:base':

    as.Date, as.Date.numeric

Loading required package: sandwich
--- finished re-building 'mob.Rnw'

--- re-building ‘partykit.Rnw’ using Sweave
Loading required package: grid
Loading required package: libcoin
Loading required package: mvtnorm
--- finished re-building ‘partykit.Rnw’

SUMMARY: processing the following file failed:
  ‘ctree.Rnw’

Error: Vignette re-building failed.
Execution halted