Businessman Denis O'Brien says he has absolutely no confidence in the integrity and ability of the Moriarty Tribunal to produce a fair, impartial and final report into matters concerning in him.
Speaking outside the Tribunal he said it is too conflicted to compromise.
Earlier, a lawyer for the Moriarty Tribunal accused legal counsel for businessman Denis O'Brien of seeking to jettison what is happening at the Tribunal.
John Coughlan SC said this morning that Eoin McGonigal SC was 'setting up for some sort of walkout'.
Mr McGonigal referred to a document which his team received over the weekend, claiming that 'stuff is being covered up'.
Mr Justice Michael Moriarty accused Mr McGonigal of occasionally making needless inflammatory remarks which were ill advised.
He said that Mr McGonigal was trying to stir up mischief by raising matters which have already been ruled on.
The Moriarty Tribunal has been hearing about the quantitative tests used in awarding a mobile phone licence in 1996.
The tribunal was told that Denis O'Brien's Esat Digiphone consortium had come first in all but one of the quantitative tests.
Dr Peter Bacon, who was commissioned by the Moriarty Tribunal to examine the process of awarding the licence, confirmed that Esat Digiphone had finished first in all but one test.
That test method was then replaced, a decision that Dr Bacon said he does not understand and believes was wrong.
Dr Bacon told the Tribunal that the margin of error in the new scoring system made it difficult or impossible to determine robustly and definitively who should have been awarded the GSM licence.
The tribunal has adjourned. It will only resume if a final witness is called and that has yet to be decided.
