Ivan, Here is what I get :
download.file('https://stat.ethz.ch/CRAN/src/contrib/PACKAGES','PACKAGES') essai de l'URL 'https://stat.ethz.ch/CRAN/src/contrib/PACKAGES' Erreur dans download.file("https://stat.ethz.ch/CRAN/src/contrib/PACKAGES", : impossible d'ouvrir l'URL 'https://stat.ethz.ch/CRAN/src/contrib/PACKAGES' De plus : Message d'avis : Dans download.file("https://stat.ethz.ch/CRAN/src/contrib/PACKAGES", : URL 'https://stat.ethz.ch/CRAN/src/contrib/PACKAGES': statut 'Peer certificate cannot be authenticated with given CA certificates' Le jeudi 24 mars 2022, 14:39:03 UTC+1, Ivan Krylov <krylov.r...@gmail.com> a écrit : On Thu, 24 Mar 2022 13:29:45 +0000 (UTC) varin sacha <varinsa...@yahoo.fr> wrote: > I have changed my CRANmirror to the Switzerland (ETHZ) one using the > function you sent to me chooseCRANmirror( ). It still does not work ! > I still cannot install the pcalg package ! That's odd. Do you see any error messages if you run the following command? download.file('https://stat.ethz.ch/CRAN/src/contrib/PACKAGES', 'PACKAGES') Maybe it would work if you set a different options(download.file.method)? Available options are: "internal", "libcurl", "wget", "curl". -- Best regards, Ivan ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.