"Has anyone had correct ref give a series of access violation errors?" YUP! And it is reparable with explorer. What you end up with is generally two banks with the same name and you can't switch. (Happened to me twice) It had the "loaded" bank using the same as another, but you couldn't rename it in PBoost. I used explorer to rename the bank that was name "whatever" character. Then I could switch. But it did it to evey bank in which the default wasn't loaded, so it was a pain. (That is why I no longer have default banks in some way...)