I've got a nice (!) ArtClass, subclassed from ObjectManager. I'd like to create an instance of ArtClass that contains a few Images, then (eventually) delete the Images. I get the following: ! The object MVC-009F.JPG does not support this operation [...] File /usr/lib/zope/lib/python/OFS/CopySupport.py, line 284, in manage_clone (Object: art_1) File /usr/lib/zope/lib/python/OFS/CopySupport.py, line 374, in _verifyObjectPaste (Object: art_1) Copy Error: (see above) This is the code: def NuovoArticolo(self,REQUEST,RESPONSE): r='' group = REQUEST.form.get('group') # list of images to be added next_art = self['next_articolo'] # next article ID: property of this folder upload = self.upload.this() # upload folder contains the images id = 'art_%s'%next_art newob=upload.Control_Panel.Products.MArticolo.ArtClass(id) newob.id=id upload._setObject(id,newob) r=r+ 'Articolo %s aggiunto.' % next_art next_art = next_art + 1 next_foto = self['next_foto'] # next image ID for i in group: newob.manage_clone(upload[i],'foto_%s'%next_foto) newob[next_foto].manage_changeProperties({'filename': i}) # store old filename next_foto = next_foto + 1 self.manage_changeProperties({'next_articolo': next_art}) self.manage_changeProperties({'next_foto': next_foto}) return r What am I doing wrong?