Conflict with cleveref package

[syrte]

AASTeX62 seems conflicting with the cleveref package. The \cref command works well with figure, table and equation labels but does not work with section label. Here is an example,

\documentclass[twocolumn]{aastex62}
% \documentclass{article}
\usepackage{cleveref}
\begin{document}
\section{Section1} \label{sec1}
\subsection{subsection1} \label{subsec1}
\begin{equation}
y=ax+b \label{eqn}
\end{equation}
Sec \ref{sec1}, \cref{sec1}\\
Sec \ref{subsec1}, \cref{subsec1}\\
Eqn \ref{eqn}, \cref{eqn}
\end{document}

It outputs warnings like

LaTeX Warning: cref reference format for label type `' undefined on input line 7.

So it failed to identify the type of the label for sections.

[augustfly]

Thank you for this report, especially with the MWE. I don't see anything in your MWE that gives me a clue as to a work around. The best response I can give is that we will queue this bug for review.

To advance the discussion, what functionality does cleveref provide that is being inhibited by its current incompatibility with aastex?

[syrte]

I've checked the document of cleveref, it mentioned a known bug, it may relate to this issue.

However the code below seems good

% \documentclass[twocolumn]{aastex62}
\documentclass{article}
\usepackage{hyperref}
\usepackage{amsmath}
\usepackage{cleveref}
\begin{document}
\section{Section1} \label{sec1}
\subsection{subsection1} \label{subsec1}
\begin{equation}
y=ax+b \label{eqn}
\end{equation}
Sec \ref{sec1}, \cref{sec1}\\
Sec \ref{subsec1}, \cref{subsec1}\\
Eqn \ref{eqn}, \cref{eqn}
\end{document}

[augustfly]

It is not clear, but this did not get fixed in v6.3 (or at least not intentionally). Retagging for v6.4

[gregschwarz]

That is right, we only focused on the siunitx.sty conflict in this round.

[bugchan]

The solution listed in the comment of this thread solve the problem for me when using aastex62.cls.

https://tex.stackexchange.com/questions/171796/cref-does-not-work-for-section-in-emulateapj-cls/239694

\documentclass[twocolumn]{aastex62}
\usepackage{cleveref}

\makeatletter
\usepackage{etoolbox}
\patchcmd\H@refstepcounter{\protected@edef}{\protected@xdef}{}{}
\makeatother