Error(s) in re-building vignettes:
--- re-building ‘vegdata.Rnw’ using knitr
trying URL 'https://germansl.infinitenature.org/GermanSL/1.3/GermanSL.zip'
Content type 'application/zip' length 3042090 bytes (2.9 MB)
==================================================
downloaded 2.9 MB

Warning in isc(elbaue, trait.db = eco, ivname = "OEK_F", method = "mean") :
  Detecting 0 values, please check.
Warning in isc(elbaue, trait.db = eco, ivname = "OEK_N", method = "mean") :
  Detecting 0 values, please check.
Error: processing vignette 'vegdata.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'vegdata.tex' failed.
LaTeX errors:
! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...
l.348 ...t]{\includegraphics[width=10mm]{veronica}
                                                  };
! Undefined control sequence.
\Ginclude@graphics ...e \expandafter {\@curr@file 
                                                  }}\expandafter \filename@p...
l.348 ...t]{\includegraphics[width=10mm]{veronica}
                                                  };
! Undefined control sequence.
<recently read> \unquote@name 
                              
l.348 ...t]{\includegraphics[width=10mm]{veronica}
                                                  };
! Undefined control sequence.
<recently read> \quote@name 
                            
l.348 ...t]{\includegraphics[width=10mm]{veronica}
                                                  };
! Undefined control sequence.
<recently read> \quote@name 
                            
l.348 ...t]{\includegraphics[width=10mm]{veronica}
                                                  };
! LaTeX Error: File `veronica' not found.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...
l.945 ...phics[width=\maxwidth]{figure/nmdsplot-1}
                                                  
! Undefined control sequence.
\Ginclude@graphics ...e \expandafter {\@curr@file 
                                                  }}\expandafter \filename@p...
l.945 ...phics[width=\maxwidth]{figure/nmdsplot-1}
                                                  
! Undefined control sequence.
<recently read> \unquote@name 
                              
l.945 ...phics[width=\maxwidth]{figure/nmdsplot-1}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.945 ...phics[width=\maxwidth]{figure/nmdsplot-1}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.945 ...phics[width=\maxwidth]{figure/nmdsplot-1}
                                                  
! LaTeX Error: File `figure/nmdsplot-1' not found.

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

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

Error: Vignette re-building failed.
Execution halted