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This mwe:

\DocumentMetadata{testphase=new-or-1} \documentclass{book} \usepackage{hyperref} \usepackage[ocgcolorlinks]{ocgx2} \begin{document} \tableofcontents \chapter{first chapter} \end{document}

produces, in the console, the following error:

(./ocgx2.toc ! Undefined control sequence. \pdf_object_new:nn ...\__pdf_backend_object_new:n {#1} l.1 ...\numberline {1}first chapter}{3}{chapter.1} %

The error occurs only with the ocgcolorlinks option.

Finally, all my documents with this 'configuration' (i.e. the simultaneous presence of the testphase=new-or-1 key, the ocgcolorlinks option and the \tableofcontents command) always compiled correctly.

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    I'll take a look at this shortly Commented May 6, 2024 at 14:42

1 Answer 1

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There are a couple of oversights in the compatibility code: the approach being used to make PDF objects is one we've adjusted, and the older one is being used here. For the present, use:

\DocumentMetadata{testphase=new-or-1} \ExplSyntaxOn \cs_gset_eq:NN \__pdf_backend_object_new:n \pdf_object_new:n \cs_gset_protected:Npn \pdf_object_write:nn #1#2 { \exp_args:Nee \__pdf_backend_object_write:nnn { \__pdf_object_retrieve:n {#1} } { \prop_item:Nn \g__pdf_object_prop {#1} } {#2} \bool_gset_true:N \g__pdf_init_bool } \ExplSyntaxOff \documentclass{book} \usepackage{hyperref} \usepackage[ocgcolorlinks]{ocgx2} \begin{document} \tableofcontents \chapter{first chapter} \end{document}
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  • I guess it will be updated soon... in the meantime, thank you Commented May 6, 2024 at 15:32
  • Still, the original input does not compile, only with -dev versions of pdflatex and lualatex. Is there anything that needs to be adjusted in ocgx2? Commented May 13, 2024 at 9:40
  • 1
    @AlexG We've moved to a dev/main split for l3backend and l3kernel, so it will be a couple of weeks before the 'release' version is updated Commented May 13, 2024 at 10:06

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