I rebooted my system during a new install in my truck. However, I cant seem to get the latest version to upload to my head unit. it copies to SD card but HU will not read. Any ideas?

Have you tried to see if you can play an mp3 (or other media) file with the sd card?  If you're not able to read the media with the AVIC-X950BH, verify the file system format you're using.  There are many issues it could be but the process seemed seamless when I upgrade my AVIC-X850BT and AVIC-Z150BH units.  Anyway, good luck.