We are using the TIBODatasets that descend from TDataset (from
reading the RB documentation, I thought this was the only option).
Also I am using RB 6.03. I don't know if you want to take the time,
but I did post this in the RB newsgroup under general and you can see
that they sent me here. However, if you think this is an IBO issue,
I'll be happy to move this thread there.

--- In ib-support@yahoogroups.com, Daniel Rail <daniel@a...> wrote:
> Hi,
>
> > We are using IBO.
>
> Try posting your message one the IB-Objects Yahoo Groups and also
> mention if you are using the native components or the TDataset
> descendants. And, don't forget to mention the version of
> ReportBuilder that you are using.
>
> Daniel Rail
> Senior System Engineer
> ACCRA Group Inc. (www.accra.ca)
> ACCRA Med Software Inc. (www.accramed.ca)