Changed to more stable solution (instead of directly manipulating the…

… list-object, we now use the removePlan-method)

contribs/application/src/main/java/org/matsim/application/prepare/scenario/CreateScenarioCutOut.java

@@ -572,7 +572,12 @@ public void run(Person person) {
 		}
 
 		// Remove all unselected plans because these are not handled
-		person.getPlans().removeIf(p -> p != person.getSelectedPlan());
+		List<Plan> plans = new ArrayList<>(person.getPlans());
+		for(Plan p : plans){
+			if (p != person.getSelectedPlan()){
+				person.removePlan(p);
+			}
+		}
 	}