Well, I got the PiFace 2, inserted it, added it, and, in the dashboard I can control On/Off each of the Outputs (I see the LEDs go On/Off). Perfect.
I have a switch and it works perfectly with the integrated GPIO. When I change the same switch to the PiFace it gives an error. I see that thiw problem has been reported but has this been solved ? Also I have severeal instances, as also reported, from PiFace. Is there a way to show only the one that is installed ?