This is a specific, statutory motion that is filed under Louisiana law. The purpose of the motion is for a party who should already have benefited from dismissal to get an order to that effect. Case law indicates that the order may be entered without hearing and without notice to the other party, because it does not actually involve the court doing anything more than carrying out a ministerial act on a case that should already have been dismissed as a matter of law (I paraphrase, but that's the gist of it).

Either he is entitled to a dismissal on the basis that no action was taken by the plaintiff within the prescribed period, or he is mistaken in his calculation of the time since the last activity on the case. It's not something that anybody here can analyze without access to the court's docket entries, and perhaps the contents of the case file.