Ah, Mac, I get your point now. I guess the problem in this particular case was that until Anton told us he knew it was an intentional omission, we couldn't know if it was an omission or a coding error. On a tangent, I'd be willing to bet things like this will confuse a lot of newer users who never used the program before changing geometries or MAT files or the sundry additions we've become accustomed to. They don't know how these things came to be in the first place and will assume they are a part of the original program. Phoenix