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i have recently aquired a resmed s8 autoset spirit 2 machine with only 50 hours on it and it is fantastic with smart start. bought as travel machine but so much better than my s9 escape that i want to use it all the time. in the clinical menu under results, it shows Pressure and AHI and AI an HI efficacy values for one night or week or six months or year. great i thought my pressure was lower than my s9cpap is set to and AI was 0, i can show them at the sleep clinic. today i unplugged the machine to move it to a different room and all the efficacy data has gone from the machine. help!. the machine as a rescan card with it which i inserted and it said copy complete. if anyone has experience of this machine please give me some advice. many thanks. ged