Error(s) in re-building vignettes:
--- re-building ‘topicmodels.Rnw’ using Sweave
trying URL 'https://datacube.wu.ac.at/src/contrib/corpus.JSS.papers_2019.04.22.tar.gz'
Content type 'application/x-gzip' length 306497 bytes (299 KB)
==================================================
downloaded 299 KB

* installing *source* package ‘corpus.JSS.papers’ ...
** using staged installation
** data
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded from temporary location
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
* DONE (corpus.JSS.papers)

The downloaded source packages are in
	'/tmp/RtmpNc0KuU/working_dir/RtmpeODheU/downloaded_packages'
Loading required package: NLP
Error: processing vignette 'topicmodels.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'topicmodels.tex' failed.
LaTeX errors:
! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...
l.925 \includegraphics{topicmodels-015}
                                       
! Undefined control sequence.
\Ginclude@graphics ...e \expandafter {\@curr@file 
                                                  }}\expandafter \filename@p...
l.925 \includegraphics{topicmodels-015}
                                       
! Undefined control sequence.
<recently read> \unquote@name 
                              
l.925 \includegraphics{topicmodels-015}
                                       
! Undefined control sequence.
<recently read> \quote@name 
                            
l.925 \includegraphics{topicmodels-015}
                                       
! Undefined control sequence.
<recently read> \quote@name 
                            
l.925 \includegraphics{topicmodels-015}
                                       
! LaTeX Error: File `topicmodels-015' not found.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
--- failed re-building 'topicmodels.Rnw'

SUMMARY: processing the following file failed:
  'topicmodels.Rnw'

Error: Vignette re-building failed.
Execution halted