I use external methods to set properties that are objects for my Dataskins. I have a Customer Dataskin with a property Address. Address is another Dataskin. In my editInstance for Customer I change the properties of Address directly: <dtml-call "propertysheets.basic.manage_changeProperties(REQUEST=REQUEST)"> <dtml-call "Address.propertysheets.basic.manage_changeProperties(REQUEST=REQUEST)"> but this results into a keyError afters a couple of edits ie. it works SOMETIMES but not all the time. Roché