I'm starting to get the hang on using transactions, and understanding them,
but I have the following question.

If I make changes to a record, then call CommitRetaining, then call
Rollback, should the initial changes be stored?

I would say Yes, but my application seems to say no!

The transaction properties are set to Read Committed (with read_committed,
rec_version and nowait specified in the settings).

Thanks,
Stephen