CTD When Altering Flightplan enroute

I checked the open issues thread, and found some FMC related issues, but wanted to run this by the group to see if my CTD is related.  I was about 6 hours into an 8 hour flight: KMIA-SBGR when I opened the FMC to add a waypoint to my flight plan.  I simply typed the name of the waypoint in, and clicked the appropriate button on the left side of FMC to insert the waypoint.  I got the hourglass for about 10 seconds, and then a CTD referencing PMDG_777X.DLL.   

I've seen some references to CTDs when making alterations during approach, but not directly enroute.

Has anyone else had a CTD when altering the flightplan during a flight?

Thanks,

John