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\glsaddallunused is designed to iterate over all defined entries and perform \glsadd[format=glsignore]{label} for every entry that hasn't been marked as used .

The \gls command (and its plural and case-changing variants) is intended as the primary way of referencing entries. This has a notion of ...

If you have at least v4.42 you can use the automake=immediate package option, which will use the shell escape at the start of \makeglossaries before the glossary files are opened.

Regards
Nicola Talbot

There are also some TeX Live security settings in texmf.cnf regarding I/O. You can use kpsewhich -a texmf.cnf to find the file. Input ( \input or \openin ) is governed by openin_any and output ( \openout ) is governed by openout_any . The most secure setting is p (paranoid)
openin_any = p
openout ...

The reason for the list of abbreviations appearing as a section rather than a chapter is because you have explicitly instructed the glossaries package to do this with the section package option:
\usepackage[toc,% add the glossary/list of abbreviations to the table of contents
nopostdot ...

The glossary style can be set globally using the style package option. For example:
\usepackage[style=long]{glossaries}
or you can set it locally within the optional argument of \printglossary . For example:
\printglossary[title=List of Abbreviations,type=\acronymtype,style=long]
There's a ...

Unicode char èco (U+DA)

The character è has the Unicode value U+00E8. The error message shows U+DA, which suggests that the file has been saved with the wrong encoding. You need to configure TeXShop to use UTF-8. See, for example, TeXShop doesn't remember file encoding.

Regards
Nicola Talbot

You don't need:
\addcontentsline{toc}{chapter}{List of Abbreviations}
Just use:
\usepackage[acronym,toc]{glossaries}
By double entries, do you mean that there are multiple items with the same entry information, for example

FB Foo Bar, 1
FB Foo Bar, 1
or do you mean some entries have more ...

You can use flowframtk to draw images and then export to pgf code. You can provide alternative LaTeX code for text areas . (It's a reimplementation of jpgfdraw and is still a little experimental, so I'm not sure if it qualifies as a good replacement. :) One day I'll have the time to do some more ...

You could try using the glossaries-extra package. For example:
\documentclass{article}

\usepackage{longtable}
\usepackage[nostyles]{glossaries-extra}

\newcommand*{\newoperation}[4]{%
\newglossaryentry{#1}{name={#2},symbol={#3},description={#4}}%
}
\newcommand*{\operationref}[1]{%
\glsdisp{#1 ...

For the page number on the right you just need to change "C" to "R":
\fancyfoot[R]{\thepage}
For the date and time stamp, do you mean the time stamp of the document build? If so, you can use \DTMnow from the datetime2 package:
\fancyfoot[L]{\DTMnow}
If you mean the time stamp of the included PDF ...