Please Note This forum exists for community support for the Mango product family and the Radix IoT Platform. Although Radix IoT employees participate in this forum from time to time, there is no guarantee of a response to anything posted here, nor can Radix IoT, LLC guarantee the accuracy of any information expressed or conveyed. Specific project questions from customers with active support contracts are asked to send requests to

Radix IoT Website Mango 3 Documentation Website Mango 4 Documentation Website

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.


    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 work?)