Sorry Ger,
What I meant by more than one line is enter a line press enter and as it is going to that command enter a new line and press enter. It was locking up the moment you pressed enter on the second line of input and the DRO though it was still moving but the motor would stall. That was corrected by taking it off continuous and putting it in step on the jog tab. Checked all lines with multi-meter and they all show okay, nice clean tone on all of them.
Will let you know what comes out of the reinstall and hopefully it was just one of the libraries or files that got corrupted and needs repaired/replaced. If my explanation above is not clear please let me know.
Michael