I've exported a folder from a 2.3.0 Zope installation and am trying to import the reulting myfile.zexp into a 2.4.1 installation on a different machine. This causes an IOError as documented below. The problem seems to have something to do with changing the ownership. Choosing 'Take ownership of imported objects' before clicking the Import button causes the IOError immediately. Choosing 'Retain existing ownership information' results in an apparently successful import, but when I click the imported Folder in the Zope management interface, the same IOError results. In other words, the folder gets imported, but I cannot view it, even if I'm logged in as root. Any idea what's wrong? Does it have something to do with the differing versions on the two machines? Joe Error Type: IOError Error Value: [Errno 5] Input/output error <snip...> [] Traceback (innermost last): File /usr/local/Zope-2.4.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 223, in publish_module File /usr/local/Zope-2.4.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 187, in publish File /usr/local/Zope-2.4.1-linux2-x86/lib/python/Zope/__init__.py, line 226, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File /usr/local/Zope-2.4.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 171, in publish File /usr/local/Zope-2.4.1-linux2-x86/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_importObject) File /usr/local/Zope-2.4.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: manage_importObject) File /usr/local/Zope-2.4.1-linux2-x86/lib/python/OFS/ObjectManager.py, line 591, in manage_importObject (Object: ApplicationDefaultPermissions) File /usr/local/Zope-2.4.1-linux2-x86/lib/python/OFS/ObjectManager.py, line 313, in _setObject (Object: ApplicationDefaultPermissions) File /usr/local/Zope-2.4.1-linux2-x86/lib/python/AccessControl/Owned.py, line 286, in manage_fixupOwnershipAfterAdd File /usr/local/Zope-2.4.1-linux2-x86/lib/python/AccessControl/Owned.py, line 187, in changeOwnership File /usr/local/Zope-2.4.1-linux2-x86/lib/python/ZODB/Connection.py, line 566, in setstate File /usr/local/Zope-2.4.1-linux2-x86/lib/python/zLOG.py, line 213, in LOG File /usr/local/Zope-2.4.1-linux2-x86/lib/python/ZLogger/ZLogger.py, line 17, in log_write File /usr/local/Zope-2.4.1-linux2-x86/lib/python/ZLogger/stupidFileLogger.py, line 99, in __call__ File /usr/local/Zope-2.4.1-linux2-x86/lib/python/ZLogger/stupidFileLogger.py, line 151, in stupid_log_write IOError: (see above)