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SW compatibility bit is not set (current Jacek's approach) >> 2. The checksum word at offset 0x3F retains its factory default value >> of 0xFFFF. > > I am already on the latest firmware. I have also tried downgrading to > earlier versions and they have the same problem. Ok, so in this case I think that we should go with option 2. Jacek - can you please add this check to your patch?