We have a Miele W1 washing machine. The display had 'cannot be changed' no matter which programme we selected. We did not know which was the last programme used. Looking on line there are many solutions that do not solve the problem.
I came across a video on YouTube showing how to cancel a programme.
https://www.youtube.com/watch?v=qo3bo2WS6uA We worked out the solution based on this video.
1. Turn the control knob to off (12 o'clock)
2. Turn off the power to the machine
3. Open the door
4. Turn on the power to the machine and wait a few seconds
5. Close the door
6. Turn the control knob to QuickPowerWash - the display advises 'cannot be changed'
7. Press start - the door locks, but nothing else happens
8. Turn the control knob to off (12 o'clock) and wait a few seconds
9. Turn the control knob to Cottons (as in the YouTube video) - the machine asks if you want to cancel the programme - select Yes - the programme is cancelled and the machine unlocks the door
Our machine then worked as it should and did not display 'cannot be changed'