Geek software is shit! The more it knows, the more potential for errors, and unfortunately they occur. I have a Z200. As you know, it can remember 2 tanks. I have 2. I swap them out sometimes, but: as soon as you swap them, the ‘new coil’ ‘old coil’ messages appear randomly. Afterwards, multiple times a day, then puff by puff. The end result is a hard reset. Then if you re-coil it, it starts all over again. Experience has shown that the dumbest is the best. 
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