Little update for my problem: I just mixed about 2h in the way that I re-mapped my dicers to control decks and used x10 as a soundcard and mixed externally. Everything worked like a dream (actually i'm pretty impressed how it all worked). So the problems start when x10's soundcard have to send data to Cross. Not when it only retrieves data from it.
All of the above are checked on ok. Also I noticed that before crash, the pitch is not where it should be. My 1210 is on zero but in software it runs in between -1.5 and -2. With u-mix44 it's spot on.
its a common thing my pitch does the same thing but i use 48000hz and it gets it back to normal, i have windows but do u have the latest drivers for the x10? i was actually gonna look into buying the mixer myself....
I solved the problem couple of weeks ago. The way to start Cross in 32bit mode on Mac is Finder - Programs - Cross -comand +1 - Start Cross In 32bit mode. Now works like a dream with my mixer. No need for external soundcard