NON JOINDER, pleading, practice. The omission of some one of the persons who ought to have been made a plaintiff or defendant along with others is called a non joinder.

2. In actions upon contracts, where the contract has been made, with several, if their interest were joint, they miist all, if living, join in the action for its breach. 8 S., & R. 308; 10 S. & R. 257; Minor, 167; Hardin, 508. In such case the non joinder must be pleaded in abatement. Id.; 3 Bouv. Inst. n. 2749.