Lawyers for President Donald Trump and the New York County District Attorney’s Office walked out of a courtroom in the Southern District of New York on Wednesday morning after a hearing that offered little resolution to their subpoena impasse, as U.S. District Judge Victor Marrero urged them to work out their differences.

The parties went to the hearing after briefing their positions on the validity of a contested grand jury subpoena, with Manhattan District Attorney Cyrus Vance Jr. insisting on compliance and Trump lawyers saying there is no justification for demanding his tax documents.