There are quite a few differences when going from the Mark IV series Integrex to the new "I" models with the Matrix 2 control. I will share, as I come across them...
Part 1 - In Mazatrol, all "B" and "C" axis positioning commands are no longer in the actual machining unit. They are rather on a separate "index" unit, more like a Horizontal mill. When loading a Matrix program into the control Matrix 2 automatically converts and inserts these units for you, with the exception of some "2-workpiece mode" situations. When programming from scratch it can be a bit of a learning curve, but not too bad.