I'll enter a flight plan (way-points) using the flight manager add feature and when I attempt to save the flight plan Flightgear closes and the flight plan is not saved.
I'm running Ubuntu 18.04
I have 16 gigs of ram
and 500 gigs of hard drive space free.
For example I've been trying to save this flight:
HECA FYM KATAB DHR IMN BOD NSL ADR TDF TGN GCTS
When I click on save the save screen comes up asking me to name the plan, I do, then hit save the screen flickers, flightgear closes and when I reopen flightgear the plan was never saved.
Suggestions?