Adam: Guess I should have used the word "accuracy" (either that or learn how to spell! [veracity]).  I'm far from and expert in this area and didn't want to steer anyone wrong.  I was impressed with the level of detail Erland included and was pretty confident it was accurate, but that was the first time I every looked into what type of error resulted in what type of action.  Very good information to know, I think I have made poor assumptions in some of my past projets

James.