No decree to be reversed or modified for error or irregularity not affecting merits or jurisdiction .-No decree shall be reversed or substantially varied, nor shall any case be remanded, in appeal on account of any misjoinder [or non-joinder] of parties or causes of action or any error, defect or irregularity in any proceedings in the suit, not affecting the merits of the case or the jurisdiction of the Court:
Provided that nothing in this section shall apply to non-joinder of a necessary party.]
For Complete Code of Civil Procedure, 1908 Bare Act. Click here.