There is a major issue with the latest timezone map being offered by Express. See this thread https://forums.garmin.com/showthread.php?258359-There-was-a-problem-communicating-with-the-Garmin-device-GARMIN&p=609845#
There are others here and on numerous other forums. The issue and solution is identified here
https://forums.garmin.com/showthread.php?259275-Timezone-Map-v16-00
Advice to anyone offered v16 is to not download it until the problem is resolved. Garmin are aware although a timeframe for the fix isn't known.
