That's what I feared. Anyway, I've figured out a fallback, not ideal, but will work in a pinch.

I built a uick little rebuild tables routine in VFP7.

I recompiled the exiting program in VFP7 with revised SDT controls [from my 2003 version of SDT] - this is not ideal, as I'm not 100% sure I have the right source for my program.

I copy the revised control tables into the user's directory, and make sure they run the rebuild program first. If they run the program first it gets confused about the new control table format and the interface to SDT being out of date. If they run the rebuild first, then it seems to be happy with that.

As far as VFP9, my customer just ordered a new copy of SDT from you.

Thanks for your help.