The former head of Solid Energy has been called to front up to a parliamentary committee to answer tough questions on the failing coal company after opposition was dropped by National MPs.
Commerce committee chairman Jonathan Young wrote to former chief executive Don Elder inviting him to front at Thursday's meeting saying the weight of public opinion would be enough to make him front and a subpoena wouldn't be necessary.
Last week current heads of the company, chairman Mark Ford and interim chief executive Garry Diack spoke to the committee and couldn't answer most questions on the company's $389 million debt.
Ford blamed the troubles at the company on falling coal prices.
Opposition MPs, led by Labour's state owned enterprises spokesman Clayton Cosgrove, urged Young to call a vote to issue a subpoena forcing Elder to give evidence to the committee - National MPs looked to block the move at the time.