Problems uploading and deleting files
> Fatal error: Call to a member function mapDataItemToElement() on a non-object in /home/u480878357/public_html/mediawiki/extensions/SemanticMediaWiki/includes/export/SMW_Exporter.php on line 594
This error can virtually not happen because each call in SMW is using `Exporter::getInstance()->getDataItemExpElement` and there should be not one single caller that is executing `Exporter::getDataItemExpElement` directly therefore I cannot tell as to what happens on your installation. Furthermore, the upload is tested against SQLStore and SPARQLStore with a real upload process [0].
Having the complete stack trace would help in guessing where `Exporter::getDataItemExpElement` is called from.
Ok, problem was definitively coming from:
http://www.mediawiki.org/wiki/Extension:RDFIO
which was calling that function. Going to try to solve it by making a clean instalation of it again (to see if i made an error, even if i know pretty much for sure that it sometimes randomly fails, from previous local instalations) and if that does not the thing, i will go for the complete stack trace.
Many thanks.
> Ok, problem was definitively coming from:
http://www.mediawiki.org/wiki/Extension:RDFIO
The `Exporter` should always be called using `Exporter::getInstance()->...`.
