Hi Sibelius,
Let me bring you, and anyone else following this thread, up to date on my long days journey into Cubase/ Arturia night!
I have been in direct contact with 3 different, very nice folks at Arturia about this issue and, to cut to the chase, they have been unable to solve the problem.
They are currently looking at the possibility of a physical issue (dare I say defect?) in the 88mkII, since I purchased it new in November and have never been able to get the interface to work with Cubase.
We have, quite literally, done everything to try to get this to work, including: factory resets of both the 88mkII and Cubase, which involved losing all of my presets and programming set up in Cubase. Software and firmware updates to all devices involved and the removal of any hardware from my recording computer that uses MIDI in an effort to remove any conflicts. As of my 5th attempt last night with Arturia... nothing. Dead in the water.
I will post an update when we reach some type of resolution with this issue.
By the way, Positive and "thumbs up" shout outs to Gabriela, Jose and Leo at Arturia!! While not yet successful, they have been persistent, supportive and professional in their help and support so far!!
Stay tuned...
John