Thread:Help talk:Repairing SMW's data/Data repair and upgrade after update/reply

> I am getting fatal PHP errors while updating the SMW database after an upgrade...

From where to where did you upgrade?

Did you follow the steps as outlined in one of the mentioned upgrade guides [0]?

> PHP Fatal error: Class 'ParamDefinition' not found

Please see [1].

[0] https://semantic-mediawiki.org/wiki/Help:Installation

[1] https://semantic-mediawiki.org/wiki/Help:Installation#Troubleshooting