Thanks so much Ivan, JL On Mon, Oct 14, 2024, at 1:33 PM, Ivan Krylov wrote: > В Sun, 13 Oct 2024 12:45:36 +0200 > "Jean-Louis Abitbol" <abit...@sent.com> пишет: > >> WARNING: >> /Users/jla/Library/CloudStorage/Dropbox/7cordas/Caio/record/90 NEW >> RODA SONG BOOK.pdf (object 254 0): object has offset 0 >> >> This does not prevent from getting the pages extracted properly and >> written to a pdf file which is readable. > >> How can I detect and potentially correct using appropriate open >> source software what is wrong with the pdf file. I am on macos. > > Here's a couple of links, [1] where people investigate and find the > root cause of the same warning and [2] where a number of possible ways > to corrupt PDF (and warning messages from various software) is > investigated, including this one. > > Ironically, this is almost in scope for R-package-devel, because the > message comes from "qpdf", a tool used by R CMD check (and > tools::compactPDF() in particular). The internal "table of contents" at > the end of the PDF file contains nonsensical references, which "qpdf" > complains about. If you run the following command line: > > qpdf "/path/to/original/file.pdf" "/path/to/reconstructed/file.pdf" > > ...qpdf will complain about the file once again, but it will also > produce a reconstructed file, which won't have this particular problem. > "qpdf" tries very hard to be "loss-less" about its transformations, so > once you verify that the reconstructed file is fine, you can replace > the original with it. > > -- > Best regards, > Ivan > > [1] > https://github.com/OpenPrinting/cups/issues/321#issuecomment-1246741326 > > [2] > https://openpreservation.org/blogs/trouble-shooting-pdf-validation-errors-a-case-of-pdf-hul-38/
-- Verif04062023 ______________________________________________ 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 https://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
