BibTeX, biblatex and biber ⇒ natbib | Bibliography not compatible

[imagine]

Hello all,

We should read the documentation of natbib, first.I obtained the same error after updating my latex system (but not before). I suspect that the former version of natbib was not able to detect the error, but the new one, does in fact.

The issue is in the way you set natbib and how you write your references. For example, "authoryear" would not work with a reference like this

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\bibitem{myref1} Author1 and Author2, Phys. Rev. Lett... (1983).

Instead, I set the following

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\usepackage[square, numbers]{natbib}

I hope this helps.

[jalcalav]

In my case the solution was simply replace an OPTyear by year (removing OPT at the beginning).

Hope it helps.