Mark,

Thank you very much for your accurate answer.

> In general though it is advisable to use the latest client library version
> as it might have fixes or improvements in the protocol. In Firebird 2.1
> some improvements were added to the protocol to reduce roundtrips, if you
> connect to Firebird 1.5 those won't be used, but when you connect to
> Firebird 2.1 you will automatically take advantage of those improvements if
> you use the 2.1 (or 2.5) client library.

I'll then implement the 6.2 FB library on all worksations.

Hernando.