Hi, I've installed Horde 3.1.2 with kronolith H3 (2.1.2) When inviting persons to an appointment I get: Notice: Only variable references should be returned by reference in /opt/lampp/htdocs/horde/kronolith/lib/Storage.php on line 55 Message Error retrieving free/busy information for test-2: Not found Any advice? Thanks. Bye