Here's a few things I did. I bought a fancy refurb with 8GB and still got both write access violations and access violations. I was beyond my wits end and very mad.1st I received bad info from someone at pg telling me lugging around the external hard drive was fine. WRONG !My excellent computer place hipped me up to this. This is a very bad idea if you're a steady working musician as I. It's a mechanical drive and needs to be babied big time hence me spending a lot for me for a computer that could handle the ultra pak and a padded backpak for it. These 2 things are a must if you're gigging with biab. Believe it or not when I got the error messages again I ran the compatibility trouble shooter and it FIXED IT at least for now. I will be using it non stop for the next week and always have my back up 2014 biab on another computer with me. I am hopeful and wish to to avoid a nasty run in with support. Sadly I lose my temper,but it is my income so I freak ! If I run into zero issues of this sort I won't be replying again because the fix held. Good luck to all. Don't be afraid to spend some money and follow the above tips if you think they may work for you. jimmyg