I have a Suunto Vyper, purchased in 2005. Many times, I have downloaded dive data since then, using the same dive computer, cables, and PC. I recently completed 15 dives from 6/19 to 6/24/17. I also had a dive in December 2016. I am using Suunto Dive Manager 3.1.0 in a Windows 7 environment. Now, the last dive the Vyper shows available for download to computer is 11/30/2015 [see attachment]. The Logbook feature shows the recent dives, which tells me the dives are in the dive computer. I have attempted to connect multiple times with the same result. I have tried using SDM5 with the same result. Does anyone have any idea why, all of a sudden, I cannot get any dive data after 11/30/2015?