I can't seem to debug my product on Zope 2.6.
Product subclasses simple item and my own classes.
Every Error produces the following informative output.
About as informative as most WinDZ errors :)
Any Clues

Site Error

An error was encountered while publishing this resource.

exceptions.AttributeError

Sorry, a site error occurred.

Traceback (innermost last):

                 Module ZPublisher.Publish, line 150, in publish_module
                 Module ZPublisher.Publish, line 114, in publish
                 Module Zope, line 134, in zpublisher_exception_hook

AttributeError: __error_log__

Troubleshooting Suggestions

                 The URL may be incorrect.
                 The parameters passed to this resource may be incorrect.
                 A resource that this resource relies on may be encountering an error.

For more detailed information about the error, please refer to the HTML source for this page.

If the error persists please contact the site maintainer. Thank you for your patience.