Ubuntu
pdfchain package

  1. Bug #1048045
  2. Comment #25

Comment 25 for bug 1048045

Revision history for this message
Rocdufer (lepcis) wrote :

Just for the record. The «PDF Chain» message for an «input.pdf»

PDFTK returned error!
Input/Output Error
Error code: 256

may be removed by decrypting «input.pdf» with the command

qpdf --decrypt input.pdf output.pdf

as Manoj did for another, related problem

https://stackoverflow.com/questions/30259554/pdftk-error-failed-to-open-pdf-file.

Nothing in the PDF file's cover says "encrypted", it says "optimized". So compression was

applied and it needs to be decompressed for PDFTK to open it.