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#21715 Error page after upgrade joomla 3

Posted in ‘Admin Tools for Joomla! 4 & 5’
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Environment Information

Joomla! version
n/a
PHP version
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Admin Tools version
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Latest post by nicholas on Wednesday, 17 December 2014 01:36 CST

wilbert1973
 On my localhost I have update my joomla 2.5 site to 3,3,6, when I want to go to the global configuration page i get an error:
Fatal error: JModelBase cannot implement JModel - it is not an interface in K:\xampp\htdocs\ws\libraries\joomla\model\base.php on line 20

when i uninstall admin tools all works fine.
When i do an install of admin tools i get this error also when i wnat to visit the options panel of admin tools

what is going on, how to solve this problem.
Wilbert Schaapman

nicholas
Akeeba Staff
Manager
Your upgrade has failed. The error message comes from Joomla! itself, not Admin Tools. Normally this doesn't happen and I have a few dozen Joomla! 3.3.6 sites running on all combinations of Ubuntu Server, Mac OS X and Windows with PHP 5.3, 5.4, 5.5 and 5.6 to prove it – let alone knowing exactly which part of Joomla!'s code this error message comes from and why.

You simply have to redo the 2.5 to 3.3.6 upgrade. Make sure that ALL your files and directories are WRITEABLE when performing the upgrade. It is IMPERATIVE that the upgrade process removes old Joomla! 2.5 files. If it doesn't, well, you've seen what the problem is.

Nicholas K. Dionysopoulos

Lead Developer and Director

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