Well,

Thank you for a quick reply, as always.

(1) I guess I should have explained that I *did* think of changing to TWideStringFields, but 430 queries in 69 forms are not something I will do in 2-3 hours, especially as there does not seem to be any logic in the change of size.
(2) I see no Oracle NoUnicodeSupport option in properties, how would I set that?
(3) Huge and multiple databases for a multi national company with number of distributed applications - I am not going to ask them to modify their policy and downgrade all other applications.

I guess I was also a bit too optimistic, as we did a similar upgrade for another client over a year ago - that client uses Devart's Oracle components, and worked without any modifications to code - so I told my client I expected this change to go smoothly...

Any other ideas? Or more information on (2)?