I have a visual studio project with Sharepoint Site structure. I didn't write any Event Receivers that will add my items (SP List Definitions, List Instances, ...) to the site. That means I use ERs included in generated by Visual Studio .wsp. When I extend SP items, or add new ones, from time to time I get "Error in feature activation" exception. I need some kind of debug to find out source(name, title, url,...) of item I did wrong. How can I achieve that?