http://developers.de/blogs/nadine_storandt/archive/2009/07/08/moss-set-advanced-permission-object-reference-not-set.aspxHey guys, I had an strange behaviour in one of our customers portals. Today the customer told me, that when he try to access the Advanced Permission Page of a Site in SharePoint he get an error: Object reference not set to an instance of an object. atenCommunityServer 2008 SP1 (Build: 30619.63)