# \subcaption does not work

I am using the following code to list 3 figures in one line. It is working well and showing the figure if I remove the \subcaption for each figure. However, when I include the (\subcaption)s, it shows the figure with the subcaptions but with error shown in the image below. Any suggestion(s)?

\begin{figure}[H]
%A
\centering
\begin{minipage}[t]{\dimexpr.355\textwidth-1em} % 0.335 represents the horizontal spacing
\centering
\includegraphics[width=\textwidth]{Fig14_VOL1_Annotated}
\subcaption{ CA $< \ang{90}$}
\label{Fig14:A}
\end{minipage}\hfill
%B
\begin{minipage}[t]{\dimexpr.355\textwidth-1em}
\centering
\includegraphics[width=\textwidth]{Fig14_volumegreater90Annotated}
\subcaption{CA $> \ang{90}$}
\label{Fig14:B}
\end{minipage}\hfill
%C
\begin{minipage}[t]{\dimexpr.355\textwidth-1em}
\centering
\includegraphics[width=\textwidth]{Fig14_vmiddlev1withannotation}
\subcaption{CA $=\ang{90}$}
\label{Fig14:C}
\end{minipage}\hfill
\caption{Volume and contact angle calculations according to CA value }
\label{Fig.14}
\end{figure}

• You should use subfigure instead of minipage. Did you do \usepackage{subcaption}? – egreg Oct 25 '18 at 13:14
• Welcome to TeX.SX! Please make your code compilable (if possible), or at least complete it with \documentclass{...}, the required \usepackage's, \begin{document}, and \end{document}. That may seem tedious to you, but think of the extra work it represents for TeX.SX users willing to give you a hand. Help them help you: remove that one hurdle between you and a solution to your problem. – dexteritas Oct 25 '18 at 13:21
• According to the error message you get, you are already using the subfig package. The subfig package does not offer a \subcaption command, and you cannot load both, subfig and subcaption. So instead of using minipage plus \subcaption, use \subfloat instead. See subfig documentation for details about the syntax of \subfloat. – user2574 Oct 26 '18 at 18:37
• what I have is a platform for editing theses and dissertations. I tried all the possible solutions you could imagine but unfortunately, no one worked. That is why I just transfer it to image. – Ali Ibrahim Oct 29 '18 at 15:01

Try the following:

\documentclass[12pt]{article}
\usepackage{graphicx,subcaption,mwe}
\usepackage{amsmath}
\begin{document}
\begin{figure}[htb]
\begin{minipage}[t]{0.2\textwidth}
\centering
\includegraphics[width=1cm]{example-image-A}
\subcaption{CA1}
\label{Fig14:a}
\end{minipage}\hfill
\begin{minipage}[t]{0.2\textwidth}
\centering
\includegraphics[width=1cm]{example-image-B}
\subcaption{CA2}
\label{Fig14:b}
\end{minipage}\hfill
\begin{minipage}[t]{0.2\textwidth}
\centering
\includegraphics[width=1cm]{example-image-C}
\subcaption{CA3}
\label{Fig14:c}
\end{minipage}
\end{figure}
\end{document}