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BQ20Z65-R1_BQEVSW-SW: Could not enter calibration mode.

Part Number: BQ20Z65-R1


I am trying to change the chemistry of an assembled battery pack but I am having trouble at the calibration step.

After loading the ROM file, It successfully loads but it won't let me calibrate and I get the following message: "could not enter calibration mode."


The battery is unlocked and in full access mode:


I am following instructions in the following document (section 1.2)


The external voltage of the battery pack measured by a DMM goes to 0, after loading the ROM file if that helps.