I am assisting a new client that contacted me when the HW-PM-120 processor for the house he just moved into lost its program and OS during power outage. I suspect the backup battery is dead. I am able to connect to the processor and do things such as set the date. However when I try to reload the OS, it fails about half way through. I notice that right before it fails, the RS-232 light stops blinking, and then another 60 seconds or so later the uploads error pops up. I've tried both 9600 baud and 115,200 baud.The only thing I can think of is, is it possible I need to use an older version of Illumination software to load the OS? There are, IIRC, about 5 versions on the website.Lastly, I assume a hwi-pm-d48-120 will serve just fine as a temporary replacement?Please folks, no lectures about him needing to upgrade :-). I know the situation and have explained it in detail to him. Our goal right now is to see if we can get the system running.Thanks for any help.