is.I think I am going to upgrade my cubase to 7. And my clock source is already set to internal. Even with the message pop up. Unfortunately Utility didn’t work at all. I tried all bufer sizes. I still have a sound like stutter (or crunch or little cuts). After restart my pc the error message is fixed but I know that I will see it soon. I check my version again. It is v1.10. I really can not understand what the problem is. I really appreciated about your interest and quick messages. Thank you.