Hello, I'm trying to update the properties of a ZClass instance based on information entered in a form. The form calls a method where the updating is carried out. The updating code looks like this: <dtml-with "myObject"> <dtml-call "propertysheets.InstanceConstants.manage_changeProperties(REQUEST)"> <dtml-call reindex_object> </dtml-with> If I hard-code the id of the instance ("myObject" here), everything works fine. However, if I tried to access the object id stored in the REQUEST object, I get an error on "InstanceConstants". Here is the code: <dtml-with "REQUEST.id"> <dtml-call "propertysheets.InstanceConstants.manage_changeProperties(REQUEST)"> <dtml-call reindex_object> </dtml-with> I tried many solutions, including <dtml-with "_[REQUEST.id]">, <dtml-with REQUEST><dtml-with id>, etc. with the same results. I think I need to access the object whose name is stored in REQUEST.id. How can I do it? Thanks. Alexandre