Harmless error rule applies to eviden-

tiary rulings. — Where appellant tenants leased property for ten years, stopped making payments, and then filed an action to quiet title to the property on the theory of adverse posses- sion, appellants’ possession of the property as tenants was permissive and not adverse; when appellee true owners moved for judgment on partial findings, the district court did not err by granting the motion and entering a judgment for appellees. While appellants did not have the opportunity to examine a witness or offer an exhibit into evidence, the district court did abuse its discretion by denying their motion to amend the findings or hold a new trial; any error in the evidentiary rulings was harmless under this section, because the evidence simply did not establish adverse possession. Horse Creek Conservation Dist. v. State ex rel. Wyo. AG, 2009 WY 143, 221 P.3d 306, 2009 Wyo. LEXIS 156 (Wyo. 2009). In ruling on a petition to modify child sup- port, the district court did not err by admitting letters from contractors stating they had no work available for the father. While the mother made a hearsay objection, the letters did noth- ing more than corroborate the father’s testi- mony; therefore, admission of the letters was harmless for purposes of this rule. Lauderman v. State, 2010 WY 70, 232 P.3d 604, 2010 Wyo. LEXIS 73 (Wyo. 2010). This rule is applicable in appeals to the Supreme Court in criminal cases. — Neel v. State, 452 P.2d 203, 1969 Wyo. LEXIS 124 (Wyo.), reh’g denied, 454 P.2d 241, 1969 Wyo. LEXIS 135 (Wyo. 1969). Effect of including nonappealable order with a valid appeal. — Although an order denying a motion for a new trial is normally not appealable, when it was included in a valid appeal from an order dismissing the action, the Supreme Court allowed it to be treated as a harmless error. Wyoming Wool Mktg. Ass’n v. Urruty, 394 P.2d 905, 1964 Wyo. LEXIS 116 (Wyo. 1964), overruled in part, Trefren Constr. Co. v. V&R Constr., LLC, 2016 WY 121, 386 P.3d 317, 2016 Wyo. LEXIS 135 (Wyo. 2016).