Mediation efforts were unsuccessful Monday between an elderly Fort Worth-area couple and the politically powerful Houston homebuilder who lost a $58 million judgment to them, the couple’s lawyers said.

Van Shaw and Dan Hagood, attorneys for Robert and Jane Cull of Mansfield, said they failed to reach an agreement with lawyers for Perry Homes owner Bob Perry, once considered one of the nation’s largest political donors. A Fort Worth judge had ordered the mediation to avoid appeals after the $58 million verdict against Perry and a home warranty company earlier this month.