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Hi Alan,

that's an excellent test example! Here's the improved code:

\documentclass{article}
\usepackage{etoolbox}

\begin{document}
\newbool{customer1}
\newbool{customer2}
%...
\newbool{customerN}
\boolfalse{customer1}
\booltrue{customerN}
This is special information:
\ifboolexpr{bool{customer1 ...

I get 0 errors. Perhaps post your updated code and the .log file you get with that code to see the exact error message and related information. I don't get an !Extra \fi error.

Stefan

Sure, that's why I suggested keeping it, but moving it to a later place. If you have it on the top, first loaded, the other packages are not only interfering but can also change the journal's settings. If you move it to the end, it applies its settings later, when another package's settings cannot ...

You have this line here:

\caption{ Numerical, exact solution and absolute error at $T = 5$, with $\Delta t = 0.1$, $\Delta x = 0.12 $ for %Eq.~(\ref{eq-27}).}

Eq.~(\ref{eq-27}).} is commented out by that percent sign, so the closing brace is missing. Remove that % symbol.

Also, I think better ...

A quick example to show that it's usually working:

\documentclass{article}
\usepackage{subcaption,lipsum}
\begin{document}
\section*{Demo of subcaption with subcaptionbox}
\lipsum[1]
\begin{figure}[htbp!]
\centering
\subcaptionbox{First dummy image}[.45\linewidth]{%
\fbox{\rule{0pt}{3cm}\rule ...

Hi,

welcome to the forum!

There may be an error in your code. Perhaps post your code here as a small, reduced copy (complete with relevant preamble like \documentclass, etc.). That code should bring the error when we test it.

Once we can test the code and see the error, we can fix it most of the ...

Something does that, but it's hard to say without knowing your document class and packages. Perhaps post that part of your file before \begin{document}.

Stefan

Hi Anuradha,

LaTeX generates the .doc file every time you run it. Document classes, packages, and macros can write to that file. Without enough information, I cannot say more. Perhaps post the entire preamble of your document.

Stefan

Hi Alan,

that's a very good question!

It's important to know that \ifstrequal doesn't expand the strings to compare them.

You can use \expandafter, \expanded, or \ExpandArgs{ee} to force expansion. The latter is documented with xparse , but it's in the LaTeX kernel already. e stands for full ...

Hi Anuradha,

perhaps use in your document:
Stefan