Thread:Extension talk:RDFIO/Updating database for RDFIO

Hello there, I tried to install this extension on my Wiki (Version 1.24), which is already running with Semantic MediaWiki (Version 2.2) for a while now. Because of that, I need to update my database after installing the RDFIO extension. Using the runJobs.php, I get this Error-Message:

"PHP Fatal error: Call to a member function mapDataItemToElement on null in [...]/extensions/SemanticMediaWiki/includes/export/SMW_Exporter.php on line 593"

This Error-Message only appears while the RDFIO-Extension is activated... Any suggestions or clues?

Thanks :)