Family dispute over Bart Cummings' assets worth millions of dollars

A family dispute over horse trainer Bart Cummings' will won't be heard until next year as his son is tied up in Melbourne's Spring Racing Carnival.

In separate cases mentioned on Friday, the late horse trainer's son Anthony Cummings and daughter Sharon Robinson are disputing how the estate is to be divided up.

Both sides are challenging the division of the Cummings assets, worth millions of dollars.

The lawyer representing Ms Robinson and another daughter Anne-Marie Casey, who is acting on behalf of their mother, Cumming's widow Valmae, 87, was attempting to have the case heard as soon as next month.

But Anthony Cummings' lawyer, Michael Jaloussis, said he wouldn't be available because of "distractions in Victoria".

"Not only is it the race that stops a nation but it stops the proceedings of the court," Justice Francois Kunc said.

Both cases have been filed against the will's executor, Aaron Randell.

Justice Kunc adjourned the matter until February 3 with the expectation the parties would enter private mediation talks before then.