Conflicting packages lastpage and hyperref

[claell]

Took me some time to nail this down from a complex document to this MWE. The error happens, when both packages are used.

MWE:

\documentclass{book}
\usepackage{lastpage}
\usepackage{hyperref}


\begin{document}

Test

\end{document}

Output:

tex4ebook test.tex
[STATUS]  tex4ebook: Conversion started
[STATUS]  tex4ebook: Input file: test.tex
This is pdfTeX, Version 3.141592653-2.6-1.40.25 (TeX Live 2023) (preloaded format=latex)
 restricted \write18 enabled.
entering extended mode
[ERROR]   htlatex: Compilation errors in the htlatex run
[ERROR]   htlatex: Filename     Line    Message
[ERROR]   htlatex: ./test.tex   870      Undefined control sequence.
This is pdfTeX, Version 3.141592653-2.6-1.40.25 (TeX Live 2023) (preloaded format=latex)
 restricted \write18 enabled.
entering extended mode
[ERROR]   htlatex: Compilation errors in the htlatex run
[ERROR]   htlatex: Filename     Line    Message
[ERROR]   htlatex: ./test.tex   870      Undefined control sequence.
This is pdfTeX, Version 3.141592653-2.6-1.40.25 (TeX Live 2023) (preloaded format=latex)
 restricted \write18 enabled.
entering extended mode
[ERROR]   htlatex: Compilation errors in the htlatex run
[ERROR]   htlatex: Filename     Line    Message
[ERROR]   htlatex: ./test.tex   870      Undefined control sequence.
        1 Datei(en) kopiert.
        1 Datei(en) kopiert.
        1 Datei(en) kopiert.
        1 Datei(en) kopiert.
Der Befehl "tidy" ist entweder falsch geschrieben oder
konnte nicht gefunden werden.
[WARNING] exec_epub: tidy command seems missing, you should install it in order
  to make valid epub file

zip error: Internal logic error (fstat(stdin))
        1 Datei(en) kopiert.
[STATUS]  tex4ebook: Conversion finished
C:\texlive\2023\bin\windows\runscript.tlu:921: command failed with exit code 1:
texlua c:\texlive\2023\texmf-dist\scripts\tex4ebook\tex4ebook test.tex

Also note that the line for the error is always 870, no matter, what I change in the document. That also made finding the issue more complicated. Possibly related or another issue.

[michal-h21]

You are right. Some Hyperref macros used by Lastpage are not defined. Try this config file:

\Preamble{xhtml}
\makeatletter
  \def\Hy@PageAnchorSlidesPlain{}%
  \def\Hy@PageAnchorSlide{}%
\makeatother
\begin{document}
\EndPreamble

[claell]

Ah, that makes sense. I'll do that!

[claell]

I think with this workaround available, this can be closed! Thanks again!

[michal-h21]

The fix is now included also in TeX4ht sources, so you don't need this configuration file anymore.

[claell]

Oh, even better. I already wondered whether this is the case! That's perfect, thanks for the hint!