In cases involving judgment on the division of property in a marital dissolution proceeding where one party wishes to have any modification made, their remedy is a timely set-aside motion within 6 months after the judgment is made, as per CCP § 473(b).
But if the 6-month time bar expires, they may find an equitable relief through Fam.C. § 2120 et seq which sets forth the strict grounds for a set aside motion, and time limits applicable (Fam. C. § 2122).
For modifications involving property division in a divorce, work with an experienced divorce lawyer for more information and proper guidance.