Robin Williams -- Judge Tells Widow & Kids ... Squash Property Beef Out of Court

Robin Williams' children and his widow have 11 days to settle their war over his personal items ... before a judge weighs in on the dispute.

During a hearing in San Francisco today ... the judge urged both parties to meet outside court -- possibly with a mediator -- to figure out who gets what.

In December, Susan Williams filed docs ... claiming a bunch of Robin's possessions -- including the tuxedo he wore at their wedding -- had been removed from their home. Robin's kids countered that Susan was trying to rob them of items like awards, watches, and photos that Robin wanted them to have.

The judge gave them an April 10 deadline.

The attorney for the Williams estate tells TMZ ... Robin was intensely private and would not want this playing out in public -- but now it has to, since Susan took legal action. He added ... no one has removed a single item from Robin and Susan's home.