Which FSUIPC command did you use? I have just rebuilt my simulator after stepping away for years, and I used to have that switch working, but now I cannot remember/figure out which command did it. Thanks! Robert  Nevermind. For some reason the "toggle DME" command does not work with that gauge in the Baron 58, just the DME on the radio stack. However it does drive the King Air version of that gauge. Not sure why, but I just took the Baron gauge out and replaced it with the King Air one and it works fine.