Error(s) in re-building vignettes:
  ...
--- re-building ‘betareg-ext.Rnw’ using Sweave
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 'betareg-ext.Rnw' failed with diagnostics:
Running ‘texi2dvi’ on ‘betareg-ext.tex’ failed.
LaTeX errors:
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.91 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.91 \begin{document}
                     
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.91 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.91 \begin{document}
                     
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.91 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.91 \begin{document}
                     
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.91 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.91 \begin{document}
                     
--- failed re-building 'betareg-ext.Rnw'

--- re-building ‘betareg.Rnw’ using Sweave
Loading required package: zoo

Attaching package: 'zoo'

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

    as.Date, as.Date.numeric

Warning in sub(object$syntax$docexpr, val, chunk[pos[1L]]) :
  argument ‘replacement’ has length > 1 and only the first element will be used
Loading required package: sandwich
Error: processing vignette 'betareg.Rnw' failed with diagnostics:
Running ‘texi2dvi’ on ‘betareg.tex’ failed.
LaTeX errors:
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.76 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.76 \begin{document}
                     
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.76 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.76 \begin{document}
                     
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.76 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.76 \begin{document}
                     
! Undefined control sequence.
<recently read> \Hy@colorlink 
                              
l.76 \begin{document}
                     
! Undefined control sequence.
\close@pdflink ->\Hy@endcolorlink 
                                  \Hy@VerboseLinkStop \pdfendlink 
l.76 \begin{document}
                     
--- failed re-building 'betareg.Rnw'

SUMMARY: processing the following files failed:
  ‘betareg-ext.Rnw’ ‘betareg.Rnw’

Error: Vignette re-building failed.
Execution halted