Hello, Using XEM 3.1 only in one of the wikis (others are fine) i not get the Activity stream working, in log it shows this error everytime i go to the webhome page: ERROR o.x.v.i.DefaultVelocityEngine  - Left side ($events.size()) of '>' operation has null value at unknown namespace[line 820, column 22] If i remove the the Activity stream gadget it stop to show this error. I try to reinstall Activity and the XE 3.1.xar but the same result. Best Regards, Ivan -- View this message in context: http://xwiki.475771.n2.nabble.com/Activity-Stream-not-display-activity-tp68… Sent from the XWiki- Dev mailing list archive at Nabble.com. _______________________________________________ devs mailing list devs(a)xwiki.org http://lists.xwiki.org/mailman/listinfo/devs