Migration to authorize.net went well but on a couple machines I am getting this error: [Plugin Warning] Unknown Internal Error; WARNING: transaction may have completed!! Please check your Transaction batch. I can find no real pattern or reason for it, I have 20 workstations all setup and only get this on a couple. Any ideas where to start? I reinstalled opti and no dice. Thanks!
I'd start by looking at the machines that are not having that problem. If it works on 18 and does not on 2, I'd look at your configuration on the working and non-working machines side by side. Most likely a typo!!!