We already figured this out and I gave the steps above to get it done. You aren't telling me anything I didn't already know but you did word it perhaps a little differently than I did above.
To get the S9 back to 2015 there has to be an erase the data thing done. No other way other that I know of to get it done. The machines won't let a person back date the calendar if there is any data on a calendar date. We can sometimes fudge things a little when it is just 1 night by carefully choosing the time we backdate but no way to back date 2 years without erasing that one 2017 night and the machine simply won't do it unless that bad date night is absent.
The SD card also has to be totally erased so that SH or ResScan won't import it again. Selectively trying to remove a file from a SD card probably wouldn't work anyway because I bet the machine would say the card is "invalid"..might as well save some work and just erase it to start with.
A new user profile then starts collecting data in the software from now. What I haven't figured out is how to purge the one bad date night from SleepyHead so the the prior user profile can be continued but just missing the one bad night in all the reports.
Apparently purging (OP tried) the selected date didn't totally remove the bad night because it was still showing in the overview graphs or something like that.
It's not the end of the world to have to use another profile in either SleepyHead or ResScan and should compliance questions ever come up...things can be put together. Maybe not in a neat pretty one page package but it can be done.
Also...in terms of insurance requirements as to compliance...if there is a problem I would assume the DME has past hours of use and they just need to be alerted to the problem and advised that maybe adding 2 things together might be needed...but that's only if there is continued compliance requirements that would need to include that old data.
It's nothing that can't be fixed with just a little bit of effort.
yaconsult wrote:Pugsy - I think that what is happening is that the data is still in the machine and on the memory card. So every time the card is read with sleepyhead, it's going to get the day with the bad date again. It will purge the detailed data after some period, but will retain the summary data for the bad date. Even reformatting the memory card won't change anything because it's still in the machine.
I fear that the only way to truly get rid of it will be to do a data reset on the machine which will purge ALL previous data. The data will still be in sleepyhead, of course, but not in the machine which will affect all of the machine displayed averages, compliance hours, hours of use, and all that other stuff.
I may have to RISE but I refuse to SHINE.