Schneberger control malfunction Fanuc 16 5-axis, only 2 accessible (backup programme

I have a Schneeberger Norma 75 machine with a Fanuc 160M control. For reasons unknown to me, all the programmes were deleted from the FS16B MAIN control. The machine started up in MS-DOS, which is the operating system installed on the machine in the MMC/IV module, but the CNC/MMC key did not switch to the CNC part. I don't know how, but in the end I managed to start up the CNC part. I copied the control libraries that were in the MS-DOS part, and I managed to get the function keyboard to work. I managed to transfer all the machine parameters I had in a backup. However, I have not been able to get the machine to reference or execute any grinding programmes, as I can only move the X and Y axes manually. What solutions are there for this? Is there a lack of internal programming of the machine, correct programmes such as the O8500? Thanks in advance.
(Apologies for my English; as it is not my native language, I have used an online transla