Support

December 9, 2022 at 3:59 am

Hi there,

Ok, so you are using NMI throughout the Auth.net AIM payment method? You’ve added some custom code to change the gateway URL I assume?

NMI allows for a gateway emulator for Authorise.net in which they handle transaction submissions using the same format as them. The error you are getting means NMI don’t allow the x_duplicate_window value to be sent on the request, auth.net do so EE sents that as part of the request.

I don’t know if NMI allow you to ignore that value on their side rather than throw an error (it seems not) but I’d recommend contacting them to see if this is possible.