A partner at Paul, Weiss, Rifkind, Wharton & Garrison who lost millions of dollars as a result of Bernard L. Madoff’s massive Ponzi scheme cannot force his ex-wife to “shoulder her share” of the losses, a Manhattan judge has ruled.

After 30 years of marriage, Steven Simkin, the chair of Paul Weiss’ real estate department, and Laura Blank spent nearly two years debating the value of their Scarsdale home, Simkin’s law partnership and a Manhattan apartment.