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Garmin Express reports "The specified unit id is invalid" for Forerunner 910XT on OSX

Former Member
Former Member
I tried to connect Forerunner 910XT (SW 2.80) to recent Garmin Express 4.1.16.0. It founds a device but it reports "The specified unit id is invalid". The only option is to cancel dialog. How to connect Forerunner to OS X? Thanks
  • Former Member
    0 Former Member over 9 years ago
    other computers the same

    I tried two other computers (OS X 10.11 and Windows 10) and connection does not work on either. I checked different LAN connections, ensured no proxy and firewall is active and results remain the same. I do not have any other idea what to do next.
  • rochty

    Is this a replacement device? One that has been refurbished? Or is this your original device that you have had for awhile?

    If the device is your original one that you have had for awhile, then the Forerunner 910XT is not reporting its Unit ID properly to Garmin Express. If it is a new device or one that has been refurbished, then it could be that the Unit ID is missing in our database. If that is the case, we will need the Serial number from your device and the Unit ID that is found when going to the About screen (MODE > Settings > About Forerunner). It would be best to call Product Support with this information.

    If it is the original device, the device will need to be master reset in order to properly report the Unit ID to Garmin Express:

    How do I master reset my Forerunner 910XT?

    After the reset, the device should properly communicate the Unit ID to Garmin Express and can be added.

    Lisa
  • Former Member
    0 Former Member over 9 years ago
    Master reset on the original device did not help

    This is the original device that was unused for some time. I tried making a master reset successfully and left device on the open air for about 40 minutes. It synchronised with the satellites but when I tried to connect to Garmin Express the error message is still the same. Unfortunately the serial number sticker is lost from the device as it is a quite old. Is there any way making connection functional? The unit ID should be available in the database, I believe.
  • Former Member
    0 Former Member over 9 years ago
    log file

    There is a log file after master reset:


    2016-02-08 23.16.36 (GMT+01:00) | 6659 | I | ANT status host:CONNECTED INITIALIZED ping:0 state:Busy
    2016-02-08 23.16.52 (GMT+01:00) | 55303 | I | ANT Search Found Device:
    ANTDeviceIdentifier{ unitID:3832063492, model:Forerunner 910XT, manufacturerID:1, deviceType:1328, authenticationType:3, hasNewData:1, pairingStatus:1, softwarePartNumber:006-B1328-00 }
    2016-02-08 23.16.52 (GMT+01:00) | 5643 | E | ServerRequest failed with Error:Error Domain=HttpStatusCodeErrorDomain Code=500 "(null)" UserInfo={NSErrorFailingURLKey=omt.garmin.com/.../GetUnitManuals}
    2016-02-08 23.16.52 (GMT+01:00) | 5643 | W | Could not download manuals for device [3832063492]: Error Domain=HttpStatusCodeErrorDomain Code=500 "(null)" UserInfo={NSErrorFailingURLKey=omt.garmin.com/.../GetUnitManuals}
    2016-02-08 23.16.52 (GMT+01:00) | 5643 | W | Custom server error 555 encountered
    2016-02-08 23.16.52 (GMT+01:00) | 5643 | W | Exception Type: Garmin.Omt.WebServiceWrapper.Interfaces.Exceptions.InvalidUnitIdException
    2016-02-08 23.16.52 (GMT+01:00) | 5643 | W | Exception Message: Invalid UnitId: 3832063492
    2016-02-08 23.16.52 (GMT+01:00) | 5643 | W | Custom Error Message: The specified Unit ID is invalid.
    2016-02-08 23.16.52 (GMT+01:00) | 5643 | E | ServerRequest failed with Error:Error Domain=ServerRequest Code=555 "The specified Unit ID is invalid." UserInfo={NSLocalizedDescription=The specified Unit ID is invalid.}
    2016-02-08 23.16.52 (GMT+01:00) | 6659 | W | Could not download info for device [3832063492]: Error Domain=ServerRequest Code=555 "The specified Unit ID is invalid." UserInfo={NSLocalizedDescription=The specified Unit ID is invalid.}
    2016-02-08 23.16.52 (GMT+01:00) | 5643 | I | Device [3832063492] update with reason: DeviceUpdateMarketSegment
    2016-02-08 23.16.52 (GMT+01:00) | 5643 | I | Device [3832063492] update with reason: DeviceUpdateImagePath
    2016-02-08 23.16.57 (GMT+01:00) | 6659 | I | ANT status host:CONNECTED INITIALIZED ping:0 state:Idle
    2016-02-08 23.16.57 (GMT+01:00) | 6659 | I | ANT disconnect success
  • Rochty

    I am sorry for the troubles. I have requested that the UnitID be investigated but since these are recorded during production in Taiwan it could take quite a while to hear back from them. I will email as soon as I receive a response.

    Again, I am sorry for the troubles.

    Curt