ISSUE SUMMARY:
Upgraded Joomla from 3.4.8 to 3.6.0.

I have just upgraded Jomsocial from 3.2.1.5 to 4.2.3.

(I used iJoomla Installer for the upgrade.)

Upgrade marked as OK.

Frontend looks OK in general (except images)

Main problem is with backend.

When I try to access Components -> JomSocial

I get the following error message:
Fatal error: require_once(): Failed opening required 'C:\x54\htdocs\kalliergo17/components/com_community/models/community.php' (include_path='.;C:\x54\php\PEAR') in C:\x54\htdocs\kalliergo17\components\com_community\libraries\core.php on line 656

I have applied the components/com_community/libraries/core.php patch

I still see the error message:

Fatal error: require_once(): Failed opening required 'C:\x54\htdocs\kalliergo17/components/com_community/models/community.php' (include_path='.;C:\x54\php\PEAR') in C:\x54\htdocs\kalliergo17\components\com_community\libraries\core.php on line 656

Hi,

seem server isssue.
please make sure this file exist at your local:
C:\x54\htdocs\kalliergo17/components/com_community/models/community.php

my suggestion, please upload it to "real" hosting.

or set your localhost by using Linux OS.

Regards

Hi Albertus,
Thank you for your reply.

"components\com_community\models\community.php" didn't exist.
I copied it from "components\com_community\" to "components\com_community\models\"
(I have to mention that it wasn't listed in components\com_community\models\ location in installation files)

Before making changes to live site ( www.kalliergo.gr ), I always first apply changes on a local test installation (currently my.kalliergo17.tst).
Live site runs on Linux.
Test site runs locally on Windows using XAMPP.
Up until now that wasn't a problem.

Problem still persist.

Update
Problem solved. Here is how.

iJoomla Installer did not update Jomsocial directly from version 3.2.1.5 to 4.2.3.
First updated to version 4.0.9.
I had to run again iJoomla Installer to try to upgrade to 4.2.3.

But then a new problem arose.
Update could not pass the Updating database step. It stuck there for ever.

After spending a few hours, I found that the problem was caused from community_files db table.
I renamed community_files table (instead of deleting it) and tun the iJoomla Installer again.
This time, the update process finished without problems and version 4.2.3 is installed.