2015-09-09 21:10 GMT+02:00 Michael Berger:
> Dear Friends of LyX,
> I have a well compiling LyX document using biblatex.
> In the preamble I have the following entry:
> *\usepackage**[**st**y**le**=**alphabetic,natbib
> =true,backref=true,backend**=**biber,babel=hyphen]**{**biblatex}*
> and in the LyX document see screen shot.
> Because I want to switch to the apa style I studied the biblatex
> reference manual, the wikilyx and other references I got hold of and then
> changed style=alphabetic to style=apa while everything else seemingly was
> correct.
> Errors:
> Undefined control sequence (5 times)
> Description:
> \printbibliography[heading=bibintoc]
> After removing the option[bibintoc] I got again 'Undefined control
> sequence' 5 times, but without above description.
>
> What could be wrong here?
>
Insert
\DeclareLanguageMapping{english}{english-apa}
\DeclareLanguageMapping{german}{german-apa}
etc. for any involved language after loading biblatex.
See the biblatex-apa manual for an exlantion why language mapping is needed
here.
HTH
Jürgen
> Thanks and cheers,
>
>
