A judge told FirstEnergy Solutions it must change its reorganization plan, which will push back its planned emergence from Chapter 11 bankruptcy and may mean former parent FirstEnergy Corp. will be responsible for power plant-related environmental costs.

U.S. Bankruptcy Judge Alan Koschik on Thursday in Akron said the former FirstEnergy Corp. subsidiary needs to change its Chapter 11 bankruptcy reorganization plan. Reports said Koschik called the plan "patently unconfirmable."

Thursday’s ruling is the latest setback in the Chapter 11 proceedings in which FirstEnergy Solutions, also known as FES, seeks to have its major creditors own the company. FES had hoped to put the matter to a creditors’ vote this month.

A spokeswoman for FirstEnergy Solutions said Koschik’s ruling means FES needs to “go back and try again.”

FirstEnergy Solutions issued a statement Thursday night saying it expects to submit a revised disclosure statement to the bankruptcy court.

“Working with our advisors, we have already initiated action to address the court’s ruling and will submit a new request to have the disclosure statement approved in a timely manner,” John Judge, FES chief executive officer and president, said in a news release. “The company remains focused on a plan that will significantly strengthen its financial position and allow it to exit Chapter 11 in 2019.”

FES said Thursday’s court ruling has no impact on its operations and that its proposed plan will enable the company to emerge as a fully integrated Independent power producer. The company said it will continue operating its nuclear and fossil power plants up to previously announced deactivation dates.

The proposed bankruptcy restructuring plan has come under heavy criticism from a number of parties, including federal and state regulators.

Previous news reports said the disputes include an FES disclosure statement that assumes FirstEnergy will not be responsible for environmental or other problems associated with FES power plants, coal ash landfills and nuclear power plants that may shut down by 2021.

A statement issued Thursday by the Environmental Defense Fund said the decision means FirstEnergy cannot use the FES bankruptcy filing to evade environmental cleanup and remediation responsibilities.

“FirstEnergy hoped to simply walk away from a steaming pile of expensive, hazardous waste,” said the statement from Dick Munson, director of Columbus-based Midwest Clean Energy. “Thankfully, today’s decision makes clear that the company can’t avoid its environmental responsibilities.”

In March, Koschik declined to approve the FES disclosure statement, which spells out possible problems with the reorganization plan that the company planned to send to creditors.

Criticisms from the Securities and Exchange Commission and other agencies also include saying FirstEnergy Solutions provided inadequate information on its reorganization plan and that all parties need more time to negotiate.

FirstEnergy Solutions filed for bankruptcy at the end of March 2018. It was the nonregulated generation arm of Akron-based FirstEnergy Corp.; FirstEnergy treats FES as discontinued operations.