NMI Error 400: General Error

What This Means

This indicates a transaction error returned by the processor.

You may check for more information on the decline within your NMI web interface for specific declines by reviewing your All Transaction Report in Reports > All Transactions.

Suggested Next Steps

If a new payment method is needed, contact the customer to have them add a new payment method and add it to their Scheduled Order.
You may also choose to add a new payment method for your customer, see "Adding a New Payment Method for Your Customer" below.
Once a new payment method is added to the Scheduled Order, the Scheduled Order should be processed with the new payment method.

Adding a new payment method from NMI for your customer?

If you are adding a new payment method for your customer directly to your payment gateway (manually) or need to update the payment method in your Scheduled Order, ensure that you edit the failed Scheduled Order, add a new payment method, and copy the required billing information directly to their Scheduled Order including:

Gateway CustomerId
Current Billing Address
Payment Method Description (optional, but strongly suggested because it is used to display the payment method to your customer)

After Resolving The Issue

Once this issue is resolved, you should use the action to Restart Processing the Failed Scheduled Order.