Michael Thank you, it all becomes clearer by the moment. My students are designing sounds from scratch, so, would it be best to have a generic preference (the none setting in preferences dialog box) that they all use and then just load the 200's bank (what they are doing) from their library. It means that none of the K2500's sounds are loaded in the memory manager. If I do use the prefs that store all the device's memory and the situation you described happens, is there a problem with each student sending their library (which they of course do each time) and overiding it. Could this cause crashes when done 10 or 15 times each day? Peter Fischer Michael Haydn wrote: >>snip > > An example: > > * User A has saved a patch X to location A-11. He quits SD with this > patch in the prefs > > * User B saves patch Y to location A-11. He also quits SD > > * Now User A loads his prefs which contains patch X in A-11, but the > device still contains Y in A-11. So SD and the device are out of > sync. This is what the warning is about. > > -- > > Beste Gruesse - best regards, > > Michael Haydn > EMAGIC Soft- und Hardware GmbH > SoundDiver Group Executive > Logic Windows Developer > Unitor8 Control Project Manager