The rules are clear, if the robot leaves the evacuation room and finds the line again the run is over and you will get the exit bonus of 20 points (3.9.2-c).
You can however call Lack of Progress for whatever reason you want (3.6.1-a), to if you call LoP before it finds the line you will have a restart and place the robot on the last visited checkpoint and try to rescue more victims. If you call LoP you will not get the exit bonus of 20 points (this time, but you can still get them next time you exit and reach the line without calling for LoP).
If you are afraid you will call LoP when the robot is escaping the evacuation room, please inform the judge beforehand so he is prepared to look for this.
Maybe we will change this rule until next year so it is more clear.
// Fredrik Löfgren, TC and OC 2016 / 2017