hello, I have a ZClass called "thema" with some date properties to change creation/ modification dates independent of bobobase_modification_time. So I try to set one date property called "date1" equal to the current time of creation: <dtml-with "manage_addProduct['RadioObjects']"> <dtml-with "thema.createInObjectManager(ZopeTime().strftime('%Y%m%d%H%M%S'), REQUEST)"> <dtml-call "REQUEST.set('date1', ZopeTime())"> <dtml-call "propertysheets.prop.manage_editProperties(REQUEST)"> </dtml-with> </dtml-with> </dtml-with> Unfortunately I am getting an "Invalid Date-Time String" error when calling the manage_editProperties. I tried some possible solutions from the mailing lists but failed so far, e.g. using ZopeTime or ZopeTime().DateTime() Any help? thanks Oliver