The Montana Supreme Court reviews a trial court’s rulings on post-trial motions for abuse of discretion.Weaver v. State, 2013 MT 247, ¶ 52, 371 Mont. 476, 310 P.3d 495. We “will reverse a trial court’s refusal to invoke M. R. Civ. P. 37 sanctions ‘only when the trial court’s judgment materially affected the substantial rights of the parties or allowed a possible miscarriage of justice.’”Weaver, ¶ 52 (citing State ex rel. State Comp. Mut. Ins. Fund v. Berg., 279 Mont. 161, 175, 927 P.2d 975, 983 (1996)).