HikaShop Authorize.net Error When Processing Order

-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3.2.3
-- Browser(s) name and version -- : Firefox
-- Error-message(debug-mod must be tuned on) -- : When submitting order via Authorize.net HikaShop Plugin, we get the following error:

There was an error while processing your transaction: 33 (TESTMODE) Invoice Number is required.

When submitting order via Authorize.net HikaShop Plugin, we get the following error:

There was an error while processing your transaction: 33 (TESTMODE) Invoice Number is required.

I've reviewed documentation but unable to find resolution to issue in past Forum posts or HikaShop Documentation.

Gene Fourney
InteractiveWest

Hi,

You've setup authorize.net to require an invoice number. Apparently this is something that can be changed in your authorize.net merchant account settings.