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XF 1.2 Problem with upgrade to 1.2.3


Active member
I do everything according to the instructions as usual and after copying files got this:

Server Error
No entry is registered for key 'db'

  1. XenForo_Application::get() in XenForo/Application.php at line 1336
  2. XenForo_Application::getDb() in XenForo/Session.php at line 232
  3. XenForo_Session->__construct() in XenForo/Install/Controller/Upgrade.php at line 46
  4. XenForo_Install_Controller_Upgrade->_setupSession() in XenForo/Controller.php at line 304
  5. XenForo_Controller->preDispatch() in XenForo/FrontController.php at line 336
  6. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134
  7. XenForo_FrontController->run() in /home/ldportal/data/www/xf.ldportal.ru/forum/install/index.php at line 18
any ideas? ^(
Last edited:
@Mike , already try to re-upload all files but no result. i noticed today, that during the first upload there was a internet connection lost. So maybe this is a result of what i have now.
Going to link you gave - redirecting to install, but i dont need it. i need update.
So this is 1 more example of what one should always:
1. make a backup copy of the database
2. use test address for rolling upgrades

But I still do not understand why re-uploading files did not help :(


XenForo developer
Staff member
Going to link you gave - redirecting to install, but i dont need it. i need update.
That is the issue -- the upload may not have been "merged", so either library/config.php or internal_data/install-lock.php has been wiped out.

If it's the first one, start the install process and have it generate that file for you but don't go any further. Then go to http://xf.ldportal.ru/forum/install/index.php?upgrade/ and it should work.
If it's the second one, simply create the file - it can be empty, it just needs to exist. (If this file has been wiped out, it's possible that attachments and avatars have been removed.)
Omg, it works! There was no hope, Mike, but you did it! Thank you :)
So the problem was that during the uploading upgrade files something happens with config.php, right?
I guess maybe i was not checkboxed "merge" for library directory...


Well-known member
When upgrading, you're actually overwriting your files. So, whenever you update a software such as xenForo, think of it as overwrite.