Incorrect label type using threeparttable and cleveref

cleverefcross-referencingthreeparttable

I'm having an issue with the threeparttable package label type, causing cleverref to not be able to refer correctly to the table. Compiling on Overleaf produces the following warning: "cref reference format for label type `' undefined on input line 8."

Is there a way to correct the label type for this table? Or another workaround that will allow cleveref to reference correctly?

MWE below:

\documentclass{article}

\usepackage{threeparttable}
\usepackage{cleveref}

\begin{document}
    
    Cleveref reference to threeparttable \cref{tab:test}.
    
    \begin{table}
        \centering
        \begin{threeparttable}
            \caption{Caption.}
            \begin{tabular}{l l}
                Header 1 & Header 2 \\
                \hline
                Entry 3 & Entry 4 \\
                \hline
            \end{tabular}
        \end{threeparttable}
        \label{tab:test}
    \end{table}
    
\end{document}

Best Answer

This is not due to either cleveref or threeparttable in particular. It happens because you put \caption within the threeparttable environment and \label cannot "see" its effects outside it. You should move \label into the environment, after \caption.

\documentclass{article}

\usepackage{threeparttable}
\usepackage{cleveref}

\begin{document}

Cleveref reference to threeparttable \cref{tab:test}.

\begin{table}
  \centering
  \begin{threeparttable}
  \caption{Caption.}
  \label{tab:test}
    \begin{tabular}{l l}
      Header 1 & Header 2 \\
      \hline
      Entry 3 & Entry 4 \\
      \hline
    \end{tabular}
  \end{threeparttable}
\end{table}

\end{document}

Related Solutions

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Fix listings and algorithm package support, broken by change to local rather than global \cref@currentlabel denitions....

From Gonzalo Medina's comment it seems that this solved it, but if it hadn't I'd say you should write to Toby Cubitt, author of cleveref with your MWE. He is very helpful and quite likely to make a bugfix.

[Tex/LaTex] cref table caption: works in body, not in lot

The diagnosis by Jean-Sébastien Gosselin is correct: the udesoftec class abuses \AtBeginDocument for typesetting material, which is not a good thing to do, see this answer by Heiko Oberdiek

The problem is that cleveref has to defer several of its tricks at begin document, but these will happen after some material has already been typeset, in particular the list of tables.

Fortunately there is a hook that can be used to transfer the material erroneously executed at begin document to \AfterEndPreamble, as suggested by Heiko. The maintainers of the class should be made aware of the problem.

I also fixed the equation, please look at it: the correct environment to use is multline and several small adjustments are also necessary; the main one is defining an operator for the error function.

\documentclass[en,printlayout]{udesoftec}
\usepackage{etoolbox}
\usepackage{cleveref}

\DeclareMathOperator{\erf}{erf}

%%% the hack!
\def\udesoftecoverride#1\mainmatter{%
  \AfterEndPreamble{#1\mainmatter}%
}
%%%

\begin{document}
\frontmatter
\mainmatter
\part{Part1}
\begin{multline}
\label{eq:CDF}
D_{\mathrm{fit}}(x) = 
  \sum_{i=1}^{N-1} 
    \frac{1}{2}K_i
    \left(1+\erf\Bigl(\frac{x-m_i}{\sqrt{2}\,\sigma_i}\Bigr)\right) \\
  + \frac{1}{2}\biggl(1-\sum_{i=1}^{N-1}K_i\biggr)
    \left(1+\erf\Bigl(\frac{x-m_N}{\sqrt{2}\,\sigma_N}\Bigr)\right)
\end{multline}

\part{Part2}
\begin{table}[htbp]
\begin{tabular*}{\hsize}{@{\extracolsep{\stretch{1}}} c  c  c  c }
    \hline
\rule{0pt}{3ex} $i$ & $K $& $m$ & $\sigma$  \\
    \end{tabular*}
    \caption{$i$, $K$, $m$ and $\sigma$ correspond to the parameters in  \cref{eq:CDF}}
    \label{tab:myTab}
\end{table}
\end{document}

enter image description here

The fixed equation