if !(defined($obj_area_current_start)){
   print "id_area_current_start: *nicht gefunden!*\n";
 } else {
   print "id_area_current_start: ".$obj_area_current_start->id()."\n";
 }
if !(defined($obj_area_current_end)){
   print "id_area_current_end: *nicht gefunden!*\n";
 } else {
   print "id_area_current_end: ".$obj_area_current_end->id()."\n";
 }