Paul,

> Okay, so I set the transaction isolation to tiCommitted on both
> transactions. And both are marked as AutoCommit = True.
>
> Now, I did some more experimenting, I deleted an existing record,
> from TABLE-A, and the TIB_LookupCombo no longer show those records,
> but refuses to show new ones, until I exit and restart the
> application.

Perhaps you are needing to use the DML Caching feature of IBO?
See the tech info sheets available on the web. There is one dedicated to
this topic.

Jason Wharton
CPS - Mesa AZ
http://www.ibobjects.com