I want to add a footnote to another footnote. Searched a lot here and there and tried lot's of stupid ideas. The closest i came up with, was
\footnote{some footnote text\footnote{secondary footnote text}}
This displays the secondary footnote properly, but "secondary footnote text" does not.
My doc shortened to the essential minimum:
\documentclass[a4paper,12pt,twoside]{scrbook}
\usepackage[utf8]{inputenc}
\usepackage[polutonikogreek,ngerman]{babel}
\usepackage[T1]{fontenc}
\usepackage{csquotes}
\usepackage{geometry}
\usepackage{microtype}
\DisableLigatures{}
\usepackage{siunitx}
\usepackage{soul}
\usepackage{graphicx}
%% some NEW COMMANDS
%...
\newcommand{\greek}{\selectlanguage{polutonikogreek}}
\renewcommand*{\raggedsection}{\centering}
\DeclareTOCStyleEntry{undottedtocline}{section}
\mainmatter
\begin{document}
%some parts, chapters and so on....
\footnote{some footnote text\footnote{secondary footnote text}}
\end{document}
siunitx
ormicrotype
to demonstrate your problem.