Contract Nullity Due to Unilateral Mistake Regarding Contract Object

The case concerned a dispute where one party alleged that a contract was voidable due to a unilateral mistake regarding the object of the agreement, arguing that the consensus essential for a valid contract was absent because the parties understood the subject matter differently. The court rejected the appeal, reasoning that a unilateral mistake is only legally grounds for nullity if it concerns a substantive quality of the thing forming the very substance of the contract, and in this instance, the lower court correctly found that the alleged error did not rise to that fundamental level necessary to vitiate the consent of the parties.