public class ActionGetTemplateBillListMod extends ActionGetTemplateBillList {
   private Logger logger = Logger.getLogger(ActionGetTemplateBillList.class);

   public void doAction() throws SQLException, BGException {
      super.doAction();

      throw new BGException("XML-документ не создан");
   }

dynaction:bill.ActionGetTemplateBillList=ru.xxx.contract.action.ActionGetTemplateBillListMod

<?xml version="1.0" encoding="windows-1251"?><data errcode="999068190" status="error">Найден неизвестный узел 'positions' на уровне 0</data>