fpl files not routing

[Sitka21]

I recently produced a few fpl files in the same manner that I always have but they did not work properly in the aircraft Garmin G1000.  My usual workflow is to open my route gpx files and then save as fpl.  I then name each user waypoint and typically a nice fpl file is produced which imports seamlessly into the Garmin G1000.  For the latest batch - when importing into the aircraft Garmin it says that the user waypoints were imported but they were not added to a flight plan.  My best guess is that there is a problem with the routing file so that it doesn't know how to connect all the user waypoints into a route the way it normally does?  That is just an amateur guess though.

If someone could help, I can attach an older file that works and a recent one that doesn't to see if we can find the problem.  I attempted to attach but received an error that the type of file is not allowed.

Thanks