I have a zClass with a multiple selection. The selected items are selected from a list of id's from a folder. They are then saved in the zClass as a list of strings. But when one of the selected items on the folder is deleted the id is still in the zClass. Naturally it should be deleted from the "selected" list automatically, but I don't think that is feasible. I would have to traverse a lot of different subfolders to see if an object was selected there. Is there a standard idiom for doing this? (Don's say zPatterns please as this won't help here.) Regards Max M -------------------------------------- Another way of explaining the same problem is here: Folder1 item1 item2 item3 item4 selectBox = ['item1', 'item2', 'item3', 'item4'] selected = ['item1','item2'] After delete of item1 from Folder1 Folder1 item2 item3 item4 selectBox = ['item2', 'item3', 'item4'] selected = ['item1','item2'] The problem is that 'item1' still is in selected.