Thanks rharv, I'll keep it in mind going forward but I have generally cutting and pasting not just deleting. I redid and overwrote the song I was working on the other day so I can't go back and test it.

In new work I'm doing as much as I can in BB and only doing final track by track edits in RB taking only baby steps and going back to the working BB file when I get the dreaded access violation error.