I suppose the HWID is 0972,got it from g7 town:
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Had 2 different firmwares newer then mine,mine is ver.5.80.
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The updater gave me that error:
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Just proceed to update ang gave the error right the way after erasing is complete.
Actually I managed to flash the firmware with the Nuvi13xx_fw3.00_HID_0972_ORG_PouchX but is older then mine 5.80 and the device is reflashing with the gupdate,.gcd that is in the internal memory right the way,after the Pouchx firmware installe