Made course as usual went to send to device - says can't find device and yet all sync'd fine and says all updates correct and show nice pick of my Edge 200 on garmin connect and the express thingy!!
You are able to upload courses to 200 Edge from Connect in Modern display? See Link-->
https://forums.garmin.com/showthread.php?97713 I have problem that I can't send courses to device also. Modern working fine in getting activities to download from Edge 200 device.