Lester,

> With Generational Records, your first example is handled
> properly, by the fact that user A *CAN* change the record,
> if user B has not posted uncommitted changes. *WHEN* user B
> posts their changes, they will get an error which has to be
> handled.

No, user B will not get an error message.
Changes are just posted, overriding the changes user A made.

I use IBO, with TIBO-query.
Just the default settings for transactions (tiCommitted, recVersion :=
true,using the timer function for committing transactions )

Leon