I don't have a DeVilbiss machine, have a ResMed. But I had the same problem with Sleeyhead. I got around it by copying the data from SD card onto my hard drive and then Sleepyhead would read the data. (You have to tell Sleepyhead where the data file is so it can read the data)

Just wanted to give an update. I have been on Cpap for 6 months now. I think I do have more energy than before treatment started. I know that I don't wake up with the pounding headaches anymore. I went through 3 other masks before settling with the Mirage Quattro. I am a very active sleeper and the...