Upgrade to 5.2 failing with 'IATCTTool' has no attribute '__iro__'

[fulv (Fulvio Casali)]

@hugozu: The easiest way is this: In the ZMI, go to portal_setup, click on Import tab, then under or you can select a profile by id : look for profile-Products.ATContentTypes:uninstall. Then click on the Import all steps button.