I'm afraid that the problem was with "\spanishdecimal{.}". I have just put the option "es-nodecimaldot" at document class, removing preamble lines and tags not appear.
-----Mensaje original----- De: Jürgen Spitzmüller <sp...@lyx.org> Enviado el: sábado, 27 de febrero de 2021 13:12 Para: CESAR MENENDEZ FERNANDEZ <ces...@uniovi.es> CC: LyX User <lyx-users@lists.lyx.org> Asunto: Re: Beamer article > I'm sorry, but I don't know where log archive is located and the > compiled document has no errors. Document > LaTeX Log (in LyX menu). > Elsewhere I have just test to change language from Spanish to English. > Then I have errors in the preamble, so I comment preamble lines > %\selectspanish %\spanishdecimal{.} And now I get no tags!! > output pdf document is OK!! Why do you load babel and Spanish explicitly in the preamble? Just selecting Spanish as document language in LyX should suffice. Anyways, this looks like a bug in babel-spanish. As I don't get it here, I suppose you need to update the babel-spanish package. Best Jürgen -- lyx-users mailing list lyx-users@lists.lyx.org http://lists.lyx.org/mailman/listinfo/lyx-users