Liquidators managing the collapse of SolarZero have opened court proceedings against the company's former directors. Grant Thornton is behind the action, which targets four people who once ran the business. The pursuit comes while creditors are still waiting to resolve claims that were never adjudicated. That unpaid group is estimated to be owed about 476 million dollars in total. The litigation marks a significant step in the effort to recover money from the wreckage. SolarZero was a prominent name in the country's solar and energy services sector before things fell apart. Observers expect the specifics of the legal claims to surface as the case moves through the courts. Creditors will be watching closely for any money that can be clawed back.