Update from version 2.4.8 to 3.1.1-2

Hello dear,

After a migration from version 2.4.8 to 3.1.1-2 that went well but when we try to view an article, the PDF file no longer appears.

Someone would have a solution?

Please can you help me with the migration process , I tried but the upgrade process fails
can you give the mothod you used to migrate and your php , mysql and versions please ?

My configuration :
PHP : 5.6.32
MySQL : 5.6.38

The process is the same :
###############################################################

  • Download and decompress the package from the OJS web site

  • Make a copy of the config.inc.php provided in the new package

  • Move or copy the following files and directories from your current OJS
    installation:

  • config.inc.php

  • public/

  • Your uploaded files directory (“files_dir” in config.inc.php), if it
    resides within your OJS directory

  • Replace the current OJS directory with the new OJS directory, moving the
    old one to a safe location as a backup

  • Be sure to review the Configuration Changes section of the release notes
    in docs/release-notes/README-(version) for all versions between your
    original version and the new version. You may need to manually add
    new items to your config.inc.php file.
    ########################################################
    Upgrading the OJS database
    After obtaining the latest OJS code, an additional script must be run to complete the upgrade process by upgrading the OJS database and potentially executing additional upgrade code.

  • Edit config.inc.php and change “installed = On” to “installed = Off”

  • Open a web browser to your OJS site; you should be redirected to the
    installation and upgrade page

  • Select the “Upgrade” link and follow the on-screen instructions

  • Re-edit config.inc.php and change “installed = Off” back to
    “installed = On”
    #########################################################

I hope this will help you solve your problem

Thank you
I did the same process but the upgrade fails. a lot of errors

Does anyone knows how to upgrade step by step i did what you said @glany but no answer I am trying to upgrade from ojs 2.4.8.3 to 3.1.1.4