Hello! I didn't find the right place where to write this message, but I got the following problem after having installed zope 2.6.1b2: ---------------------------- Site Error An error was encountered while publishing this resource. exceptions.ImportError Sorry, a site error occurred. Traceback (innermost last): * Module ZPublisher.Publish, line 150, in publish_module * Module ZPublisher.Publish, line 57, in publish * Module ZPublisher.Publish, line 208, in get_module_info * Module Main, line 30, in ? * Module Globals, line 23, in ? * Module App.PersistentExtra, line 15, in ? ImportError: (<class exceptions.ImportError at 0x80cfdd4>, 'cannot import name Persistent') ------------------------------ I have the following: Python 2.1 debian package Apache_1.3.27+OpenSSL_0.9.7+ModSSL_2.8.12 I had a look at the code: it demand for a Persitent module, but I didn/t find any Persitent.py file: is it normal? thanks in advance, Stefano Catholic University of Louvain Department of Computing Science and Engineering Place Sainte Barbe, 2 B-1348 Louvain/la/Neuve, Belgium Phone: +32 10 47 90 13 Fax: +32 10 45 03 45