A new appeal from the convicted Lockerbie bomber is due to take place in Edinburgh later.
Lawyers for the man jailed for the Lockerbie bombing have asked the Crown to hand over documents which they said could help overturn his conviction.
It follows a decision by Scottish Criminal Cases Review Commission to refer the case back to the Appeal Court.
A court was told their non-disclosure could indicate that Abdelbaset Ali Mohmed al-Megrahi was the victim of a "miscarriage of justice".
Abdelbasset Ali al-Megrahi is not expected to be present at hearing.
The Libyan's legal team said it needed the documents to prepare its appeal.
The full appeal will be heard by five judges next year. If Megrahi's conviction is overturned, he will be freed from his life sentence.
They were granted an extension until the 21 December - the 19th anniversary of the disaster in 1988.
The fresh appeal will be the first stage of a process which is unlikely to be completed for several months.
The hour-long hearing - which Megrahi did not attend - was the first time the case has come to court since he was granted the right to a second appeal earlier this year.
Cast doubt
The full appeal - before a panel of five judges - is likely to be heard next year.
Prosecution and defence lawyers will discuss with a panel of three judges various legal issues arising from the appeal.
The most controversial is likely to be a demand from Megrahi's legal team for documents to be handed over by the American government.
It has been claimed that before his trial in the Netherlands, prosecutors were shown papers by the American CIA which may have cast doubt on Megrahi's guilt.
These were never disclosed to the defence team as criminal justice rules demand.
One of the grounds for referring the case back to the Appeal Court was non-disclosure.
