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Fail to upgrade 2.8.4 due to versioning problem


  • While upgrading to the core 2.8.4, i have encountered error message pop up.
    Refer to photo for details of error and GUI.

    0_1484880272136_ErrorMsg1.jpg
    0_1484880399992_ErrorMsg2.jpg

    Kindly advise what should I do to resolve the problem.

    Thank you.


  • Hi Desmond,

    An UnknownHostException means it could not resolve the URL. It means either the DNS is not configured or not working properly. You can resolve the problem by ensuring your gateway is resolving URLs and that you have internet access from the computer running Mango (i.e. at the command line does ping www.google.com work?)