Input index file .idx not found

Question

I know this is a question that has been asked in many forms and I should find a solution out there, but I am simply not able to.

I am using Texstudio to type a document. I have the following in my preamble:

\usepackage{nomencl}
\usepackage{makeidx}
\makenomenclature

With various nomenclature entries, for example:

\nomenclature{$T$}{Test}

I then have this within the document environment:

\begin{document}
\maketitle
\printnomenclature

I then do a latexmk followed by the Makeindex sequence. The document compiles but without the nomenclature.

This error prints to the console: Input index file filename.idx not found. Usage: makeindex [-ilqrcgLT] [-s sty] [-o ind] [-t log] [-p num] [idx0 idx1 ...]

where 'filename' is the name of my Latex document.

I interpret this as I have to run the makeindex [-ilqrcgLT] [-s sty] [-o ind] [-t log] [-p num] [idx0 idx1 ...] command to create the .idx file. But I have no idea to actually run this command.

Answer 1

You didn't give a full example, but from what I can see makeindex attempts to run an index input file with extension .idx that usually would be created from the \makeindex command of the makeidx package. This is what you usually do for indices. However, you are trying to set a nomenclature which also uses makeindex as backend but uses different input files, i.e. files with the extension .nlo.

So you could either

• run the appropriate command for making the nomenclature by hand: makeindex filename.nlo -s nomencl.ist -o filename.nls,
• add a command to TeXstudio that runs it for you, as explained in Makeindex no .nls file, or
• configure latexmk to process the .nlo file as explained in latexmk and nomencl.