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Calibration fault with bq20z75

Calibration of batteries LiOn. During the calibration of the current it happened something and I mistakenly closed the transaction with the command HEX 0021.
Now, if I read a wrong current, the system drives the object always in discharge.I tried to reset several times with the command HEX 0041, but nothing; I tried to recharge the batteries with the default configuration, but I do not do it anymore. Can anyone give me some help?