Hi all, I'm testing an external method which adds a folder and then adds a document to that folder and this happens when opening the tree in the management interface on that folder's parent: Illegal State Sorry, a Zope error occurred. Traceback (innermost last): File /root/t/Zope/lib/python/ZPublisher/Publish.py, line 256, in publish_module File /root/t/Zope/lib/python/ZPublisher/Publish.py, line 161, in publish File /root/t/Zope/lib/python/ZPublisher/mapply.py, line 154, in mapply (Object: manage_menu) File /root/t/Zope/lib/python/ZPublisher/Publish.py, line 98, in call_object (Object: manage_menu) File /root/t/Zope/lib/python/App/special_dtml.py, line 120, in __call__ (Object: manage_menu) File /root/t/Zope/lib/python/DocumentTemplate/DT_String.py, line 514, in __call__ (Object: manage_menu) File /root/t/Zope/lib/python/TreeDisplay/TreeTag.py, line 154, in render (Object: a tree tag) File /root/t/Zope/lib/python/TreeDisplay/TreeTag.py, line 221, in tpRender (Object: ApplicationDefaultPermissions) File /root/t/Zope/lib/python/TreeDisplay/TreeTag.py, line 607, in decode_seq Illegal State: ['\000\000\000\000\000\000\000\001', '\000\000\000\000\000\000\003*'] Any ideas? TIA Phil phil@philh.org