Hi Dorin

>Actually, a double will take only 8 bytes, less than a numeric 12 or 15

That's better, furthers my conviction that doubles should be used with picture clauses.

>>I guess, with domians VFP has nothing to worry about? for VFP it will still be a numeric type.
>Yes, from what I've seen

Okay

>Sorry, I don't know about something like this. I intend that, in my case, the application to handle changes in main database, by maintaing a special table (included in EXE) with tables versions and write migration code by hand or data driven. If you find something more simple, please let me know.

I don't know, but this, though I am complaining about it as I have user specific tables also, sounds simpler to me.

1) Use Marathon (of if you please IBExpert) to generate a complete script (Metadata Extract without data)
2) Use Database Comparer to compare the Master (this Marathon script) and the Target, the actual fbd on the users machine
3) Click on the update button after studying the update-script in Database comparer and lo you have an updated fdb