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Thread: InfoWater Error when running scenario

  1. #1
    Join Date
    Feb 2014

    InfoWater Error when running scenario

    When running a scenario I get the following error

    System Error 110: cannot solve network hydraulic equations.
    ** Run failed **

    ** Error: hydraulic simulation failed due to ill-conditioned error **

    Any ideas on what could be causing this error?


  2. #2
    Forum Moderator

    Innovyze Employee

    Innovyze Employee

    Join Date
    May 2015

    Thanks for your post. According to the help file error 110 is as follows:
    110 - An analysis was terminated because the network
    hydraulic equations could not be solved
    . Check for portions of the
    network not having any physical links back to a tank or reservoir or for
    unreasonable values for network input data.

    The solution matrix becomes ill-conditioned in these cases because it cannot identify a known head value to use as the starting point for a portion of the system as there is a part of the system it can't link back to a tank or reservoir. Check as noted for areas where the system is getting disconnected and causing this issue. Is a tank going empty or 100% full before this error occurs? Run a tank group graph set to % Full and look for tanks going full or empty. Once they do either they can get disconnected by EPANET and can potentially create an ill conditioned situation and may be the cause.

    Please reply back if you have difficulty finding the problem with this new information and we can assist more as necessary.

    Innovyze Support

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