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I had this happen on mine once when the battery was low after winter storage. It said it took the license but before it was actually applied to the ecu the battery went flat in the car. Had to send a log file to ecutek an they sent me a new license. Put my battery on charge and tried again and it fixed the issue.
Always make sure the cars battery has a good charge. I got very lucky that it died when it did and not mid map transfer or I would have bricked the ecu. Something I was aware could happen from my days of tuning my wrx but didnt cross my mind because I daily drove the WRX so the battery was always good and charged where the brz had just come from storage and the battery had not been on a maintainer.
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