Hello, I spend a long time trying to understand why I could not override a component in ZCML and debug the error. First, includeOverrides doesn't include any overriding registration. At least not like you would expect. At best It can be used to include a package in the site.zcml that would conflict with an another, replacing the conflicting actions by his own. After I would love, when there is a conflict error in ZCML to have a bit more of information other than what we currently have: like which file include which file and so up to the conflicting actions. As I pdb through this conflict, I see that all this information is already there, it is just not included in the exception nor displayed to the user. This information can be found in zope.configuration.config line 1517, in the variable includepath and basepath. This just need to be added to the exception. Since I work with Zope and ZCML, having those informations to debug conflict errors would have saved me days of works, at least. My issue was that an another package was already including the package that contained actions I wanted to override, so even if I wanted to include it myself in order to override its actions, it would not be included since it already have been included. Finally, I think a bit of documentation on ZCML conflict errors would help a lot everybody. Regards, Sylvain, -- Sylvain Viollon -- Infrae t +31 10 243 7051 -- http://infrae.com Hoevestraat 10 3033GC Rotterdam -- The Netherlands