Freider, thanks for taking the time, it’s appreciated.
First time it didn’t open I lost the data because I rushed to reinstall. Second time I installed from the backup on iTunes. I could do the same again but it seems pointless…
There are so many variables that its really hard to know what’s causing the problem. This time Cubasis was running fine when I closed it. Next day it wouldn’t open. I’m begining to wonder if other audio Apps are having an effect but in truth I can’t see any pattern and because it refuses to open at the start of your next session rather than during use you can’t even remember exactly what you were doing.