Plane 4.0: Accelerometer Calibration does not do anything

After clicking “Calibrate Accel” all I get is “Click when done”.


ArduPlane 4.0.0
MP 1.3.68

It is waiting for the vehicle to be still enough to calibrate the gyro. If you hold the vehicle still for a few seconds it will say “Please place vehicle LEVEL”

Unfortunately not.
I assume because it’s armed, see here.

solved, it was the arming state.