[Tex/LaTex] Getting an error related to \prevdepth when using \caption on a figure with subfloats

captionserrorsfloatssubfloats

I am writing a manuscript and I am using the subfloat package to include in a figure several figures, if I don't include a caption it compiles nicely, but when including the caption I get the error

! Improper \prevdepth.

I have tried using the caption package too but doesn't seem to work.
What I have looks like:

\documentclass[aps,preprint,pra]{revtex4-1}
\usepackage{natbib}
\usepackage{graphicx} 
\usepackage{subfig}

\begin{document}

\begin{figure}
\centering
\subfloat{
\begin{tabular}{cc}
\hline \hline
First Column & Second column \\[1ex]
\hline

 \includegraphics[width=0.45\textwidth]{figure1} &\includegraphics[width=0.45\textwidth]{figure2} \\[0.5ex]

\hline \hline
\end{tabular}
}\caption{Caption for figures 1 and 2}\label{fig1and2}
\end{figure}

\end{document}

If someone can comment on this I will really appreciate it.
Thanks,

Best Answer

Always call

\usepackage[caption=false]{subfig}

with the revtex4-1 document class, which is not compatible with caption. The option is indeed meant not to load the caption package along with subfig (it will emulate the needed features).

Note that it's better avoiding blank lines inside \subfloat (not required, though). More importantly, you're missing some % and getting unwanted spaces:

\subfloat{% <----------- important
  \begin{tabular}{cc}
  ...
  \end{tabular}% <------ important
}
\caption{...}\label{...}
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