...waived by the parties and it is the duty of an appellate court to consider lack of subject matter jurisdiction ex mero motu. City of Huntsville v. Miller, 271 Ala. 687, 127 So.2d 606 (1958); Payne v. Department of Industrial Relations, 423 So.2d 231 (Ala.Civ.App. 1982). If a court is without subject matter jurisdiction, any judgment rendered therein is void. ARCP.... We find that on appeal, the circuit court lacked subject matter jurisdiction to consider more than a final judgment over which the district court had subject matter jurisdiction. See State v. Pollock, 251 Ala. 603, 38 So.2d 870 (1948); Craig v. Root, 247 Ala. 479, 25 So.2d 147 (1946). Accordingly, the circuit court was without subject matter jurisdiction to consider the merits of John Deere's claim. Any judgment rendered without subject matter jurisdiction is void and...entered in district court. The Court of Civil Appeals affirmed the order, reasoning that under ARCP 14 (dc), the district court was without subject matter jurisdiction to enter a judgment. We quash the writ...