A district court's decision whether to allow amendment of an Information is reviewed for an abuse of discretion. An Information must reasonably apprise the accused of the charges against him, so that he may have the opportunity to prepare and present his defense. State v. Wilson, 2007 MT 327, ¶ 19, 340 Mont. 191, 172 P.3d 1264.
It is elementary that a defendant may waive objections to the filing of an amended information by failing to raise them even though the amendment goes to matter of substance. State ex rel. Treat v. Dist. Ct., 122 Mont. 249, 253, 200 P.2d 248, 250 (1948). See also Gransberry v. State, 149 Mont. 158, 163, 423 P.2d 853, 856 (1967).