Shopify/active_merchant — pull request #307 by dennisoconnor (2012-03-19 18:14:13+00:00)
Title: [Code Review] More useful results for ePay authorization errors

Users were getting an ambiguous error message when using ePay: "Location header not included." Upon further investigation, it was discovered to be an error on the ePay site. In many cases, trying to process the payment again corrected this problem This patch will change the error message to "ePay did not respond as expected. Please try again.", and the response code and message from ePay will be added to the result.

Please Review:
@jduff @csaunders