Why must RCE's be fatal?

[Q]

This recent RCE occurs in the combat simulation and in the turn processing of a simultaneous game. First I had it in the simultaneous game and it took quite a time till I found out that it was connected to the death star ship.
The error has now been reported to MM and I will see what he finds out.
But I believe this is certainly not the Last RCE and therefore some more information when it occurs and a fail-save mechanism that would allow to continue the game would be great if possible.