Hi all, Being trying for more than three days to catch my problem, reading ZPatterns and AccessControl code, I am lost. I explain my situation again hoping someone can help me. I create a ZClass HumanClass with the following characteristics: Base Classes ZObject, _ZClass_for_DataSkin with one empty DataSkin Attribute Property Sheet. I create a specialist with a default rack with the following characteristics: Class to use for stored items: HumanClass Objects are: loaded by accessing attribute getNames where getNames is a python method in a DataSkin Class Extender. It is defined as : import string list = string.split(context.id, '_') return list[1] The rack has also a SkinScript Method defined as following WITH self.getNames() COMPUTE prenom=RESULT I get a unauthorized error if I then try to render, even with the manager role, the following DTML stored in the specialist : <dtml-var standard_html_header> <h2><dtml-var title_or_id></h2> <dtml-with "defaultRack.getItem('100_Peter')"> <dtml-var id> </dtml-with> <dtml-var standard_html_footer> The error message is the following : Traceback (innermost last): File E:\BubbleNetTestSite\lib\python\ZPublisher\Publish.py, line 222, in publish_module File E:\BubbleNetTestSite\lib\python\ZPublisher\Publish.py, line 187, in publish File E:\BubbleNetTestSite\lib\python\ZPublisher\Publish.py, line 171, in publish File E:\BubbleNetTestSite\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: index_html) File E:\BubbleNetTestSite\lib\python\ZPublisher\Publish.py, line 112, in call_object (Object: index_html) File E:\BubbleNetTestSite\lib\python\OFS\DTMLDocument.py, line 189, in __call__ (Object: index_html) File E:\BubbleNetTestSite\lib\python\DocumentTemplate\DT_String.py, line 538, in __call__ (Object: index_html) File E:\BubbleNetTestSite\lib\python\DocumentTemplate\DT_With.py, line 146, in render (Object: defaultRack.getItem('100')) File E:\BubbleNetTestSite\lib\python\OFS\DTMLMethod.py, line 261, in validate (Object: index_html) File E:\BubbleNetTestSite\lib\python\AccessControl\SecurityManager.py, line 144, in validate File E:\BubbleNetTestSite\lib\python\AccessControl\ZopeSecurityPolicy.py, line 168, in validate Unauthorized: id Thanks to anyone who could help me... -- Godefroid Chapelle BubbleNet sprl rue Victor Horta, 30 1348 Louvain-la-Neuve Belgium Tel 010 457490 Mob 0477 363942 TVA 467 093 008 RC Niv 49849