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random System.NullReferenceException in .NET program with 32-port USB relay.

Discussion in 'Relay Modules' started by Wlaarhov, Oct 29, 2016.

  1. Wlaarhov

    Wlaarhov New Member

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    Hello Experts,

    I am using a 32-port USB relay board (windows 10) with latest driver installed.
    when using a .NET program (not written by me) i keep getting "System.NullReferenceException".
    Framework-version: v4.0.30319

    Behavior is "random", not predictable.
    The program is running a sequence of activation/de-activation of a number of relais.
    So "generally speaking" it works, but .NET crashes every now and then.

    Anyone seen this before?

    thanks a lot,
     

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