I would just like to state my opinion on "where is piper going?". I think the answer will be much clearer once we have at least a basic integration of all the layers. When we have the GUI, DL, BL and PL talking together, we'll see what it can do and what would be nice to have. Until we reach that point, I don't think we should decide anything. I don't know how stated this law of development: "Make it work, make it right, make it fast". We're still in the make it work phase. Jean-Marc -- Jean-Marc Valin Universite de Sherbrooke - Genie Electrique valj01 at gel.usherb.ca