Unresolved references label within caption for STATA tables

Question

I am using stata to generate a table. This STATA generated tex table has label defined within \caption{} command. This labeling should work. But it gives me unresolved references (Table ??). When I manually take out the label which is inside the caption command and post it after \caption{}, the labeling works.

I am struggling to find the problem here. Is there any other way to give command in STATA that will keep \label{} after \caption{}. Or Can I keep using the same format with some modification?

{
  \begingroup
  \let\oldcaption\caption
  \renewcommand{\caption}[1]{\oldcaption{Regression table}}
  \renewcommand\normalsize{\small}%
  \normalsize
  \begin{center}
   \input{../RESULTS/table.tex}        
  \end{center}
 \endgroup
}

Answer 1

If I understand the question correctly, you have some auto-generated LaTeX code which uses \caption{...\label{...}...} and you would like to change the caption text while preserving the label. This MWE would show the problem:

\documentclass{article}
\begin{document}

\let\oldcaption\caption
\renewcommand{\caption}[1]{\oldcaption{Regression table}}

% This table represents the auto-generated code
\begin{table}
    \centering
    \caption{A table\label{A}}
\end{table}

\ref{A} % does not work since the caption text and label was replaced
\end{document}

One possible solution would be using the helper macro \caption@getlabel offered by the caption package which tries to extract the \label from it's argument:

\documentclass{article}
\usepackage{caption3}
\begin{document}

\makeatletter
\let\oldcaption\caption
\renewcommand{\caption}[1]{%
  \oldcaption{Regression table}%
  \caption@getlabel#1\label{}\@nil
  \caption@thelabel
}
\makeatother

\begin{table}
    \centering
    \caption{A table\label{A}}
\end{table}

\ref{A}
\end{document}

Note that only caption3 is loaded (and not caption) since this package only provides helper macros and no re-definition of existing ones, so it should be compatible with all document classes. (If you load the caption package anyway you could drop \usepackage{caption3}.)

Caveat: \caption@getlabel is an internal macro, not documented in the user documentation of the caption package. But I (as author and maintainer of the caption package bundle) do not intend to change its interface in the future.