33. Validity of service and of proceedings.- No service under these Rules shall be deemed invalid by reason of any defect in the name or description of a person in the list of contributories or in the petition, summons, notice or other proceeding. provided that the Court is satisfied that such service is in other respects sufficient; and no proceedings under the Act or these Rules shall be invalidated by reason of any formal defect or irregularity, unless the Judge before whom the objection is taken is of the opinion that substantial injustice has been caused by such defect or irregularity and that the injustice cannot be remedied by an order of Court. | 