Migrate Webdynpro DC to 7.3

Hi,

I am trying to migrate the Webdypro Dcs from 7.01 to 7.3.

When I use the migration wizard, it copies all the methods, events, handlers and context from interface controller to the component controller.

Then the wizard tries to delete the implementation coding from the interface controller. But it gives me build error if any of the method has any return type other than void.

Has anyone faced the same issue? Please give me suggestions

Thanks