I want to build an instance of ZClass like <dtml-call "REQUEST.set('id',REQUEST.form['id_neu'])"> <dtml-with "manage_addProduct['Tauschboerse']"> <dtml-call "SkizzeClass_add(_.None,_, NoRedir=1)"> </dtml-with> <dtml-call "REQUEST.set('meine_skizze',_[REQUEST.form['id_neu']])"> <dtml-call "_['meine_skizze'].propertysheets.Beschreibung.manage_changeProperties({ 'Name':REQUEST.form['Name'], 'Email':REQUEST.form['Email'], 'Sprache':REQUEST.form['Sprache'], ..... where 'Sprache' is the name of a CHECKBOX. It works fine, if all checkboxes are checked. But if not all checkboxes are checked, I will get an keyerror. What can I do? -- ----------- -------------------- Walter Hupfeld --------------------------------