BMW Navigator IV - Cannot Authenticate Maps Message

Discussion in 'Mapping & Navigation' started by jotunheim, Sep 27, 2011.

  1. jotunheim

    jotunheim Junior Achiever

    Joined:
    Aug 10, 2010
    Oddometer:
    10
    Location:
    SE Wisconsin
    Just in case anyone else had a mild annoyance by the "Cannot Authenticate Maps" on their BMW Navigator IV for the past several months, Garmin tech support responded with a one line message:

    Delete the gmapsupp file from the unit. Please let me know if you have
    any other questions.


    Works! The error is now gone and there is only the most recent map set (2012.20) on the unit. The unit always was functional before, but as stated above, would always have the annoying message before moving on to the main screen.


    Jason
    #1
  2. Kayaker

    Kayaker Been here awhile

    Joined:
    Jan 13, 2008
    Oddometer:
    162
    Location:
    1/6 Adirondacks, 5/6 Asheville, NC
    Thanks -- I'll give it a try this morning.
    #2
  3. ChiefB

    ChiefB n00b

    Joined:
    Oct 1, 2011
    Oddometer:
    1
    Location:
    Mizzouri with St. Robert
    Thanks for the tip and it works!
    #3
  4. TheOffRoadKid

    TheOffRoadKid n00b

    Joined:
    Oct 19, 2009
    Oddometer:
    2
    Location:
    CA Sierras
    thank you for posting this fix. It worked for me too
    #4
  5. johns78c

    johns78c Adventurer

    Joined:
    Apr 24, 2012
    Oddometer:
    45
    Location:
    Central Coast, NSW, Australia
    ok, so I have three different GMAPSUPP files. IMG, GMA and UNL extensions. I take it I don't delete the IMG file, but which of the others do I delete?
    #5