The calibration stops.

[sakaida]

Hello.
Although installing the latest OS, calibration stops often.
Once restarted, the calibration can be completed.
Is this a breakdown?

[extempo]

The Prophet Rev2 doesn't require frequent calibration. It's calibrated once at the factory, and this is often good for the life of the instrument.

As long as your last calibration completed successfully, you are good to go.