Hello Salavatore,

> All of this works fine and I can update the three fields, but I
> detect the erratic behaviour of the UpdateBar. The Update button is
> always enabled, even when it should not, that's to say when I have
> already clicked it and I am already in edit mode.

That the Update button always stays enabled is the standard behaviour.
Myself I can click it repeatedly without problem - nothing happens, I
just stay in Edit mode. I don't get the error you reported
(Transaction already started).


Greetings,
Paul Vinkenoog