Hi Michal,

Thank you so much, this solved all my problems :-).
Best regards

Kristian

Currently, I get many error messages when using htlatex in connection with biblatex.

The following minimal example

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\documentclass{article}
\usepackage{biblatex}
\begin{document}
\end{document}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

compiles well in latex and pdflatex (to an empty document), but with htlatex I get the error

"! Package biblatex Error: Patching 'ifthen' package failed."

(using miktex with all packages updated from CTAN, including biblatex.sty from 2020/12/31 v3.16 and the biblatex.4ht version from (2019-12-20-14:01) ).

Any help would be greatly appreciated.

Best regards

Kristian