biblatex error. Can't get correct pdf output

[Wolfgang Engelmann]

On 08.01.22 12:09, Herbert Voss via lyx-users wrote:
> 
> 
> There is the key missing, for example
> 
> @InBook{Ding2019,
> ...
> 
> btw: do not attached the biblatex-spbasic, it is already part of
> TeXLive and MiKTeX.
> 
> Herbert
> 
> 
Heureka!

How stupid I missed it. Adding the key solved things, and now the pdf of 
the book to which the bibliography belongs is also outputted.
Would be nice to know how one could find out from the log file whats wrong.
Thanks a lot, Herbert.

Wolfgang