Hi, I have written a little product, and I wanted to use of Interface. But an attribute error of __basicnew__ appears. What __basicnew__ for ?? How do I have to change my interface ?? Here is the AttributeError code : Traceback (innermost last): File D:\Zope\lib\python\ZODB\Connecting.py, line 544, in setstate File D:\Zope\lib\python\ZODB\Connecting.py, line 217, in _persistent_load AttributeError: Interface instance has no attribute '__basicnew__' Here is my interface : from Interface import Base class Annuaire(Base): "An Annuaire" def getMots(self): "Returns number of votes cast for a given response" def getLigneun(self): "Returns the line #1 " def getFile(self): "Returns the filename" Sincerily PS -------------------------------------------------- Oreka ! Nous sommes l'internet moins cher ! Surfez 25% moins cher avec http://www.oreka.com