Problem compiling Bibliography on Gummi

Question

I am trying to create cites and bibliography,in ApJ style, using the tex commands below using Gummi.

\documentclass[12pt]{article}

\usepackage{ natbib}
\citestyle{aa}
\begin{document}

\section{Introduction}

\cite{texbook}

\section{Conclusion} 

\cite{Narendra_1990}

\bibliography{Bib2}{}
\bibliographystyle{apj}

\end{document}

However, I keep getting the following error:

/tmp/.LatexEssay.tex.bbl:8: Undefined control sequence.
l.8 {Worthey}, G. 1994, \apjs
                         , 95, 107
/tmp/.LatexEssay.tex.bbl:8:  ==> Fatal error occurred, no output   PDF          file    produced!
Transcript written on /tmp/.LatexEssay.tex.log.

My Bibtex file is:

    @Article{Narendra_1990,
    author =       {K.S.Narendra and K.Parthsarathy},
    title =        {Identification and Control of Dynamical System
                  using Neural Networks},
    journal =      "IEENN",
    year =         {1990},
    volume =    {1},
    number =    {1},
    month =     {},
    pages =     {4-27},
    note =      {},
    annote =    {}
    @BOOK{texbook,
    author = "Donald E. Knuth",
    title= "The {{\TeX}book}",
    publisher = "Addison-Wesley",
    year = 1984
    }
    @ARTICLE{1994ApJS...95..107W,
    author = {{Worthey}, G.},
    title = "{Comprehensive stellar population models and the disentanglement  of age and metallicity effects}",
   journal = {\apjs},
   year =  1994,
   month = nov,
   volume = 95,
   pages = {107-149},
   doi = {10.1086/192096},
   adsurl = {http://adsabs.harvard.edu/abs/1994ApJS...95..107W},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

If I cite the texbook and Narendra_1990 references I have no problem. It is only when I include the 1994ApJS...95..107W reference that the error occurs.

Any help appreciated!

Answer 1

As you can read in the given error message

/tmp/.LatexEssay.tex.bbl:8: Undefined control sequence.
l.8 {Worthey}, G. 1994, \apjs
                         , 95, 107

you have an undefined control sequence \apjs that causes the error. I guess it should contain the name of a journal. So add the line @string {apjs = {The correct name of the journal}} (add the correct name please) to your bib file. With a little pretty printing it could look like this:

@string {apjs  = {The correct name of the journal}}
@ARTICLE{1994ApJS...95..107W,
  author  = {{Worthey}, G.},
  title   = {{Comprehensive stellar population models and the disentanglement 
    of age and metallicity effects}},
  journal = apjs,
  year    = {1994},
  month   = nov,
  volume  = {95},
  pages   = {107--149},
  doi     = {10.1086/192096},
  adsurl  = {http://adsabs.harvard.edu/abs/1994ApJS...95..107W},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System},
}

Did you recognised the -- in field pages?