die "No valid delivery order found" unless ref $do eq 'SL::DB::DeliveryOrder';
my $dt = DateTime->today->subtract(days => $::instance_conf->get_undo_transfer_interval);
die "No valid delivery order found" unless ref $do eq 'SL::DB::DeliveryOrder';
my $dt = DateTime->today->subtract(days => $::instance_conf->get_undo_transfer_interval);