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

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

2015-10-15 13:23:13 SMW\UpdateJob MACBEATH_Jimmy (id=57732) STARTING PHP Fatal error: Class 'ParamDefinition' not found in /var/www/wiki/extensions/SemanticMediaWiki/includes/query/SMW_QueryProcessor.php on line 664

And....

PHP Fatal error: Class 'ParamDefinition' not found in /var/www/wiki/extensions/SemanticMediaWiki/includes/query/SMW_QueryProcessor.php on line 664

PHP Fatal error: Class 'ParamProcessor\StringParam' not found in /var/www/wiki/extensions/Maps/includes/ServiceParam.php on line 18

Several similar errors revolving around this ParamProcessor, I installed Validator and set it up in LocalSettings, bit worrying.

Is this a known problem?

Debian Squeeze

PHP 5.3.3-7 MySQL 5.1.73-1