Hey,<br><br>The DataType code that recently got merged into Wikibase now enforces properties to have a DataType. Calling getProperty or toArray on a Property without a DataType will get your an exception. This means that if you created properties before the new code got introduced they will now be invalid.<br>

<br>Cheers<br><br>--<br>Jeroen De Dauw<br><a href="http://www.bn2vs.com" target="_blank">http://www.bn2vs.com</a><br>Don&#39;t panic. Don&#39;t be evil.<br>--<br>