Error(s) in re-building vignettes:
  ...
--- re-building ‘MOB.Rnw’ using Sweave
Loading required package: party
Loading required package: grid
Loading required package: mvtnorm
Loading required package: modeltools
Loading required package: stats4
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
Error: processing vignette 'MOB.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'MOB.tex' failed.
LaTeX errors:
! Undefined control sequence.
<argument> cite.\@citeb 
                        \@extra@b@citeb 
l.73 \begin{document}
                     
! Emergency stop.
<argument> cite.\@citeb 
                        \@extra@b@citeb 
l.73 \begin{document}
                     
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building 'MOB.Rnw'

--- re-building ‘party.Rnw’ using Sweave
Loading required package: party
Loading required package: grid
Loading required package: mvtnorm
Loading required package: modeltools
Loading required package: stats4
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: coin
Loading required package: survival
Error: processing vignette 'party.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'party.tex' failed.
LaTeX errors:
! Undefined control sequence.
<argument> cite.\@citeb 
                        \@extra@b@citeb 
l.111 \begin{document}
                      
! Emergency stop.
<argument> cite.\@citeb 
                        \@extra@b@citeb 
l.111 \begin{document}
                      
!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘party.Rnw’

SUMMARY: processing the following files failed:
  ‘MOB.Rnw’ ‘party.Rnw’

Error: Vignette re-building failed.
Execution halted