Hi, I'm using a ComboBox with an ArrayCollection as dataProvider.
This ArrayCollection is the source of an AdvancedDataGrid GroupingCollection. If the users clicks on an item in the ComboBox,the ArrayCollection gets filtered: private function filterNodesInGrid():void { // assign filter function to the AdvancedDataGrid's dataProvider IHierarchicalCollectionView(nodes.dataProvider).filterFunction = filterByRfids; // refresh the ADG's dataProvider //found in the archives http://www.mail- archive.com/flexcoders@yahoogroups.com/msg95231.html nodes.invalidateProperties(); IHierarchicalCollectionView(nodes.dataProvider).refresh(); // expand all nodes nodes.expandAll(); } When the refresh is called, this error is thrown: Bookmark no longer valid. at ListCollectionViewCursor/seek()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\coll ections\ListCollectionView.as:2046] ... but beside the error, it works correct !? Does anybody have an idea how to overcome this issue. thank's _rico