Quote:
Originally Posted by davidfor
This is usually a sign that the database on the device is corrupt. While running, everything is OK as the device is running on an in-memory copy of the data. But, it can't update the database because it is corrupted. Powering off forces the database to be read at startup and that will have old and possibly incomplete data.
If you have a backup of the database, you can restore it. Otherwise the fix is to log out on the device and then back in. The device will create a new database and reload the books into this.
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This solved the problem. I had also problem with note taking (they were not saved). Now it is all right. thx