Hallo, at trying Atmel Studio 7.0 Beta I got an error message box "Object reference not set to an instance of an object" at "start debugging" button. The same project works fine with AS6.2. The project ist an IAR project, which I loaded with File/Open/Open Objectfile for Degugging, format Ubrof8. My tool is JTAGICE3. In an other thread I read, that this error can depend on the grade of optimization. Optimization is set high in the IAR compiler, but as I said, it works fine with AS6.2.
Thanks for any hints