Using Visual Studio 2012 RC, I added new sharepoint 2010 Project & try to add New Reporting item (Show in screen shot)
It shows me following error message:-
Error loading workflow
An error occured while loading the workflow. Please correct the following error and try reloading the document to view the workflow.
the designer could not be shown for this file because none of the classes within it can be designed. The designer inspected the following classes in the file: Report1. The base class Report1 for the class needs to be an Activity.