I am trying to move my application from Zope 2.5 to Zope 2.7. There was the security audit, so problems are expected to crop up. But I stumpled across something unexplicable... Pretty innocent Python Script gives error "ValueError: unpack list of wrong size". To investigate the error, I installed VerboseSecurity. The error dissappeared. I removed VerboseSecurity. Error appeared. I installed VerboseSecurity again. Error disappeared. How is this possible? I did not even set ZOPE_SECURITY_POLICY=PYTHON, because I was not sure if Zope 2.7 reads environment variables. Yet VerboseSecurity "fixed" the error. I don't like this kind of fix... especially since I do not understant it. Here's the script in question: Dct={} Dct['readers'] = context.readers+1 context.propertysheets.data.manage_changeProperties(Dct) It's the third line that caused the error. This script runs "proxy Manager" because it updates a property even if the user is not the owner of the ZClass instance that this script belongs to. Here's the traceback: Traceback (innermost last): * Module ZPublisher.Publish, line 100, in publish * Module ZPublisher.mapply, line 88, in mapply * Module ZPublisher.Publish, line 40, in call_object * Module OFS.DTMLMethod, line 130, in __call__ <DTMLMethod instance at 4187a320> URL: http://localhost:9080/choroby/ucho/skalni/obecne/1/index_html_top/manage_mai... Physical Path:/www.orl.cz/choroby/ucho/skalni/obecne/1/index_html_top * Module DocumentTemplate.DT_String, line 474, in __call__ * Module Shared.DC.Scripts.Bindings, line 320, in __render_with_namespace__ * Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec * Module Products.PythonScripts.PythonScript, line 318, in _exec * Module None, line 3, in inc_readers <PythonScript at /www.orl.cz/choroby/ucho/skalni/obecne/1/inc_readers> Line 3 * Module AccessControl.Owned, line 123, in getWrappedOwner ValueError: unpack list of wrong size -- Milos Prudek _________________ Most websites are confused chintzy gaudy conflicting tacky unpleasant... unusable. Learn how usable YOUR website is! http://www.spoxdesign.com