A financial dispute over construction costs is delaying the planned opening from the National September 11 Memorial Museum in Ny about the 11th anniversary from the attacks pick up, officials said on Friday.

Arguing over money will be the Port Authority of latest York and New Jersey, which is overseeing construction with the World Trade Center site in lower Manhattan, and the National September 11 Memorial Foundation, which designed the museum and raised the amount of money to build it.

The Port Authority says the foundation owes it about $300 million for construction costs, while the foundation says the Port Authority owes it about $146 million as a consequence of construction delays.

“There’s absolutely no way of computer opening by the due date,” Mayor Michael Bloomberg, chairman of the foundation, said on Thursday. “Work has basically stopped.”

More than a million everyone has visited the nation’s September 11 Memorial, integrated the footprints from the twin towers, since it opened on September 12, the building blocks said.

The museum is being built near the memorial, much of it set deep beneath the ground inside cavernous foundations in the towers which are destroyed by hijacked jets on September 11, 2001. It’s that will chart the events prior to the attacks and their aftermath.

“I think that (the) most important much of this museum becomes it right,” said Joseph Daniels, the foundation’s president.

Both sides said on Friday these folks were working to take action, but a revised opening date hasn’t been announced.

“We are working with all the city to solve the issue,” Port Authority spokesman Steve Coleman said.