RCPTT: Invalid eclipse target platform: No name

I want to add a RCPTT test in my RCP eclipse application. When I create a "New application under test", I select the product for which I do my RCPTT test (the location of the plugins folder), but I get the error: " Invalid eclipse target platform: No name". Tried with RCPTT Tool 2.3.0 and 2.4.2, none of them works.