Hi Laurent did you read my recent thread?
https://stat.ethz.ch/pipermail/ess-help/2024-August/013340.html
Not sure if your issue is the same, but it sounds similar. The
following worked for me:
(setq-default buffer-file-coding-system 'utf-8)
(setq-default coding-system-for-read 'utf-8)
(prefer-coding-system 'utf-8)
On Tue, Sep 10, 2024 at 1:11 PM LaurentEss via ESS-help
<ess-help@r-project.org> wrote:
>
> Dear ESS-Help-list,
>
> I use .Rnw file and polymode. In a code R chunk, when I evaluate
> for example the line cat("test équation") that is to say with an
> accented character "é" I have the following error message : Error:
> invalid multiple character in parser
>
> In the emacs windows which embodies the R session, I typed: C-h v
> buffer-file-coding-system RET and I can read in the help windows: Its
> value is 'utf-8-unix'. When I compile the .Rnw and then create the pdf
> file there is no trouble the accented characters are taken into account
> and my document is correct.
>
> But it is annoying to debug my R chunks, I have to remove the accented
> characters to rewrite them after in the final version.
>
> How could I resolve this trouble ?
>
> Thank you
>
> Laurent
>
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