The Public Accounts Committee has been forced to abandon a meeting with officials from the Department of Finance - after legal advice from its own lawyers.
TDs were due to meet senior civil servants to correct the record after the discovery of lost documents relating to the sale of SiteServ by IBRC.
But the committee was given legal advice saying any discussion could compromise the Commission of Investigation which is now looking into matters relating to IBRC.
That is despite the Department of Finance having separate legal advice which said there should be no problem in returning to the committee to correct the record.
Yesterday Taoiseach Enda Kenny said the judge leading the inquiry into IBRC will produce a report at the end of the year - whether his work is finished or not.
He was speaking as the Dáil approved the Terms of Reference for the Commission of Investigation, which is due to report back by December.
The Dáil voted 119-20 in favour of setting up the IBRC inquiry yesterday evening, with Fianna Fáil and most independents backing the Government, and Sinn Féin opposing.
Retired High Court judge Daniel O'Keeffe, who is also a trained accountant, has been named as the chairman of the inquiry.
