Solid Energy last night confirmed it would place no constraint on Dr Elder appearing but it could not compel him do so.
Labour's state-owned enterprises spokesman Clayton Cosgrove, who claims the Government was "asleep at the wheel" while Solid Energy made a series of poor investment decisions, has led calls for Dr Elder to appear. He is also calling for a parliamentary inquiry into the company's problems.
Meanwhile, a spokeswoman for the company said reports that Dr Elder was still receiving a $1.3 million salary were incorrect. She said Dr Elder's $850,000 base salary before performance-based incentives was more likely to reflect his current pay rate.
Dr Elder was unavailable for comment last night but was expected to issue a statement.
He resigned in early February just two weeks before the company revealed it was in talks with the Government and its banks over a crippling $389 million debt burden.