# Springer bibliography issue - spbasic

I am using Springer's template svjour3.cls. Since it can be easy to obtain package, for example here I am getting directly to the problem. I have the following MWE, some part comes from directly template

\documentclass[smallextended,natbib]{svjour3}
%\usepackage[round]{natbib}
%\usepackage[numbers]{natbib}
\begin{document}
Unlike \cite{harsanyi73}
\bibliographystyle{spbasic}
\bibliography{bibch1}
\end{document}


The problem is that according to manual I need to write natbib in \documentclass[smallextended,natbib]{svjour3}, however, I am getting the error Package natbib Error: Bibliography not compatible with author-year citations. Also error is \providecommand\NAT@force@numbers{}\NAT@force@numbers. I added natbib as usual i.e. \usepackage[round]{natbib} and I got the same error. However, it works fine if I change round to numbers. I have already checked this question or this one, but I couldn't find a solution to my problem. Thanks for any help in advance!

Edit: Here is an example of bibliography

  @article{harsanyi73,
author = {Harsanyi, John C.},
title = {Games with Randomly Disturbed Payoffs: A New Rationale for Mixed-Strategy     Equilibrium Points},
year = {1973},
journal = {International Journal of Game Theory},
volume = {2},
pages = {1--23},
}

• in additiom to the unrelated eps file the document ends \en{document} presumably you didn't test it before posting. Also C:/Local Tex Files/bibtex/bib/misc/bibch1 is not going to work for most people, just use \bibliography{bibch1} and supply a test bib file that shows the problem. Nov 10 '14 at 20:28
• I have edited in the light of above comments. Still, as I expected the problem is there. Nov 10 '14 at 22:17
• Thanks for posting usable code. Have you tried blowing away all aux files and recompiling from scratch? The reason I ask is that spbasic is a bibliography style that will indeed produce authoryear-style citation callouts if natbib is loaded without any options. Hence, the error message seems to be something of a misdirection, possibly because of some corrupted code in one of the aux files.
– Mico
Nov 10 '14 at 22:29
• @Mico, I have tried a couple of times erasing all files and by recompiling, but couldn't figure it out what exactly problems is. Nov 10 '14 at 22:37
• A problem might be \cite{harsanyi 73} with a space. Nov 10 '14 at 22:39

It should have been stated in the User Guide, but spbasic.bst contains the following:
• Thank you! Adding \usepackage[numbers]{natbib} fixed my problem of the references formatting. This answer should have been accepted. Jun 24 '21 at 7:46