The rule that an objection as to the place of suing shall be taken in the court of first instance is…

Section 21(1) of the Code of Civil Procedure provides that "no objection as to the place of suing shall be allowed by any appellate or Revisional Court unless such objection was taken in the Court of first instance at the earliest possible opportunity" and there has been a consequent failure of justice.

Section 21A bars a separate suit to set aside a decree on such an objection, section 20 deals with where suits are to be filed, and section 22 with transfer where a suit may be filed in more than one court.