LaTeX.org

Crosspost: https://tex.stackexchange.com/questions/639039/ . The answer there by polyn has the following suggestion:

\documentclass{article}
\usepackage{chemfig}
\begin{document}
\schemestart
\subscheme{
\subscheme{D + L}
\arrow(a--b){0}[-90,0.3]
\subscheme{I + H}
\arrow{0}[-90,0.3]
\subscheme{I ...

The code cannot be compiled as we don't have any of the files you're inputting.

Also you can't have \newpage and \tableofcontents and so on before \begin{document} .

The biggest problem with the code above: \makelistoftables and \makelistoffigures are undefined... they are not standard LaTeX ...

Crosspost: https://tex.stackexchange.com/questions/639126/

command names cannot have digits in them. Command names may only consist of what (La)TeX regards as “letters”, see the TeX FAQ: https://texfaq.org/FAQ-linmacnames

Crosspost: https://tex.stackexchange.com/questions/631157/

Crosspost: https://tex.stackexchange.com/questions/630256/

Common packages for a task like this are acro, acronym, nomencl and glossaries

I answered the same question on TeX.sx :

The package fixfoot can be used for footnotes with the same text that are repeatedly used.

Switching from the acronym package to acro we can
modify \DeclareAcronym to also declare a new fixed footnote;
define a new template for the first appearance which ...

My best guess is that this is a font-setup problem but since I actually never really use MusixTeX I can't really help.

You posted the exact same question here: https://latex.org/forum/viewtopic.php?f=44&t=33426 so I will lock this thread in order to avoid double answer.