Add failure in case no successful visit

archival.rb

@@ -302,6 +302,10 @@ def main
 		trains: failed_trains,
 	}))
     File.write('./last_executed_run.txt', $datestr)
+    
+	if visited_stations.count == 0 and visited_trains.count == 0
+		exit 1
+	end
 end
 
 if __FILE__ == $0