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Hi, have a 2013 R/U Uconnect 8.4 with Navigation. Downgraded to CPT13, which seemed to go OK. It showed the hour-glass and then the progress bar all the way to completion. . However, once completed i got the Error Reflashing Errorcode : 0x 31A0. When I start the Nav app it just sits at the loading please wait.... screen. I've tried to upgrade, reflash same version but all attempts fail with the same error. The progress bar does not move at all. I've tried using the original USB i used to downgrade and 7 other different brands/sizes (all formatted to Fat32) - but still same issue. Even tried an SDCard and DVD but they weren't recognized. I may be wrong but believe 31A0 means it doesn't like the USB stick Going into Dealer mode and checking the Navigation info all fields are all blank. Any ideas how I recover this