When running CardExchange® Gateway (CardExchange® Producer or CardExchange® Visitor), you may receive the following error that prevents the application from running.

This appears to be a bug in the .NET framework which can be resolved by following the steps below.

• First, go to C:\Windows\Microsoft.NET\Framework. There you will see folders for the different versions you have installed.
• Go to the folder v4.0.30319, open the Config folder and then open the Machine.Config file in a text editor.
• In that file, search for the string “<DbProviderFactories/>”, if you found that you can see the following code:

• The <DbProviderFactories/> doesn’t belong there so delete this line:
• Save it and look in the other folders to see if the line is there too. It’s possible that this line also appears in v2.0.50727.

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