Sinumerik Alarm 120003 Area %1 cannot be deactivated. Please try again
%1 = Operating area name
Within the scope of an area switchover, an area is to be deselected. However, the area refuses this. The area switchover does not take place.
– Alarm display.
Try again and, if possible, close the reluctant area first.
- Siemens Diagnostics Guide by Siemens