Hi Yesterday we upgraded from Zope 2.4.0 to 2.5.1 (binary release, python 2.1, win32-x86), python 2.1.3, win32) ZServer/1.1b1 and now, I cant access some folders, error is always the same: Error Type: SystemError Error Value: Failed to import class atoi from module ZPublisher.Publish Traceback (innermost last): File D:\Zope\website\lib\python\ZPublisher\Publish.py, line 150, in publish_module File D:\Zope\website\lib\python\ZPublisher\Publish.py, line 114, in publish File D:\Zope\website\lib\python\Zope\__init__.py, line 159, in zpublisher_exception_hook (Object: Gabriel) File D:\Zope\website\lib\python\ZPublisher\Publish.py, line 98, in publish File D:\Zope\website\lib\python\ZPublisher\mapply.py, line 88, in mapply (Object: manage_main) File D:\Zope\website\lib\python\ZPublisher\Publish.py, line 39, in call_object (Object: manage_main) File D:\Zope\website\lib\python\Shared\DC\Scripts\Bindings.py, line 252, in __call__ (Object: manage_main) File D:\Zope\website\lib\python\Shared\DC\Scripts\Bindings.py, line 283, in _bindAndExec (Object: manage_main) File D:\Zope\website\lib\python\App\special_dtml.py, line 172, in _exec (Object: manage_main) File D:\Zope\website\lib\python\DocumentTemplate\DT_In.py, line 637, in renderwob (Object: objectItems) File D:\Zope\website\lib\python\DocumentTemplate\DT_In.py, line 763, in sort_sequence (Object: objectItems) File D:\Zope\website\lib\python\ZODB\Connection.py, line 472, in setstate SystemError: (see above) I've been able to track the error to the SQLMethods contained in the folder. Every folder that had an SQL Method inside can't be accessed. Any attempt to access a string property (title, meta_type, src, arguments_src) of an SQLMethod gives the above error. Only old SQLMethods are afected (objects converted from 2.4 to 2.5); new SQLMethods work fine. Gabriel Genellina Softlab SRL