Hi, I'm currently trying to create a python product. I've got a class named MyClass, and in the __init__ method I've got the following code: self.manage_addFolder(id="data", title="MyClass instance's datas") self._addRole('admin') self.manage_permission(permission_to_manage = "Access contents information" , roles = [ 'Manager', 'admin' ]) MyClass inherits from Folder. I want to programmatically create a 'data' Folder and an 'admin' role in each new instance of MyClass, and give this role and Manager (but not Anonymous) the "Access contents information" permission. The manage_addFolder and _addRole work fine, but the manage_permission call gives me the following traceback: Error Type: AttributeError Error Value: aq_acquire Traceback (innermost last): File /usr/local/zope/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /usr/local/zope/lib/python/ZPublisher/Publish.py, line 179, in publish File /usr/local/zope/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook File /usr/local/zope/lib/python/ZPublisher/Publish.py, line 165, in publish File /usr/local/zope/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_addMyClass) File /usr/local/zope/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: manage_addMyClass) File /usr/local/zope/lib/python/Products/MyClass/MyClass.py, line 45, in manage_addMyClass File /usr/local/zope/lib/python/Products/MyClass/MyClass.py, line 153, in __init__ (Object: ElementWithAttributes) File /usr/local/zope/lib/python/AccessControl/Role.py, line 208, in manage_permission (Object: ElementWithAttributes) File /usr/local/zope/lib/python/AccessControl/Role.py, line 136, in ac_inherited_permissions (Object: ElementWithAttributes) File /usr/local/zope/lib/python/OFS/ObjectManager.py, line 173, in _subobject_permissions (Object: ElementWithAttributes) AttributeError: (see above) Surprisingly, if I delete the manage_permission line, restart Zope, re-add an instance of MyClass (it works), then try to manually modify the permissions using the MyClass instance's security tab, then it works flawlessly. Does anyone have got an idea about where the problem may come from ? thanks in advance. Jerome ALET - alet@unice.fr - http://cortex.unice.fr/~jerome Faculte de Medecine de Nice - http://noe.unice.fr - Tel: 04 93 37 76 30 28 Avenue de Valombrose - 06107 NICE Cedex 2 - FRANCE