Matter Control not working on MAC OS Mojave 10.14.4



  • Matter Controls crashes on launch with the following error:

    at MatterControlMac.MainClass.Main (System.String[] args) [0x00007] in :0
    [ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'MatterHackers.MatterControl.SlicerConfiguration.ProfileManager' threw an exception. ---> System.NullReferenceException: Object reference not set to an instance of an object

    In my case I had a previous version of Matter Control 1.5 installed and I was able to fix it by removing the user data for Matter Control.

    The data is in a ".local" folder in your home folder instead of the expected "Application Support" folder in my case:

    /Users/ctk/.local/share/MatterControl

    In the terminal you can type to rename the old folder or just delete it:

    mv ~/.local/share/MatterControl ~/.local/share/MatterControl_OLD


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