Hi Andreas, thanks again for your answer.

Why do you say it is an error. It is a deprecation warning. This warning framework is also used in Python to warn about the usage of deprecated features that will change or go away in a later release. But it is not an error and does not limit your functionality.

I'm not talking about the deprecation warning but about the error message I received after installing the update (it was in the citation - I should have mentioned it more explicitly): Traceback (innermost last): File /usr/local/zope/lib/python/ZPublisher/Publish.py, line 223, in publish_module File /usr/local/zope/lib/python/ZPublisher/Publish.py, line 187, in publish File /usr/local/zope/lib/python/Zope/__init__.py, line 226, in zpublisher_exception_hook (Object: de) File /usr/local/zope/lib/python/ZPublisher/Publish.py, line 171, in publish File /usr/local/zope/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: index_html) File /usr/local/zope/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: index_html) File /usr/local/zope/lib/python/OFS/DTMLDocument.py, line 199, in __call__ (Object: index_html) File /usr/local/zope/lib/python/DocumentTemplate/DT_String.py, line 546, in __call__ (Object: index_html) File /usr/local/zope/lib/python/OFS/DTMLMethod.py, line 188, in __call__ (Object: standard_html_header) File /usr/local/zope/lib/python/DocumentTemplate/DT_String.py, line 546, in __call__ (Object: standard_html_header) File /usr/local/zope/lib/python/Products/Renderable/Renderable.py, line 17, in __str__ (Object: standard_site_menue) File /usr/local/zope/lib/python/OFS/DTMLMethod.py, line 195, in __call__ (Object: render) File /usr/local/zope/lib/python/DocumentTemplate/DT_String.py, line 546, in __call__ (Object: render) File /usr/local/zope/lib/python/DocumentTemplate/DT_In.py, line 770, in renderwob (Object: objectValues(['SimpleNav Element'])) File /usr/local/zope/lib/python/Products/Renderable/Renderable.py, line 17, in __str__ (Object: ab) File /usr/local/zope/lib/python/OFS/DTMLMethod.py, line 203, in __call__ (Object: render) KeyError: validate Bye Erich