Mr. Klein, the head of Park Tower Realty and a commission co-chairman, brought a remarkable document to the news conference.

But the chief fault did not lie with the architects, or with their developer, Park Tower Realty.

The president of Park Tower Realty, George Klein, attended yesterday's meeting but would not discuss what he would do next.

"We've been looking around in several countries for the past few years," said Veronica Hackett, executive vice president of Park Tower Realty.

The city, the Transit Authority and the lead developer, Park Tower Realty, have also each pledged $5 million in the event of cost overruns.

"We will stick it out to the end," George Klein, president of Park Tower Realty, said in an interview.

"No way," said Jayne Sacks Rosenhaus of Park Tower Realty, which manages the building.

The intention was to build 7,000 to 10,000 housing units on a platform above covered parking, with Park Tower Realty as joint-venture partner.

But officials of the 42d Street Development project, a joint undertaking of city and state, chose a then lesser-known developer, Park Tower Realty.

The branch and its programs are supported by Park Tower Realty and I.B.M., the developers of the building.

Mr. Klein, the head of Park Tower Realty and a commission co-chairman, brought a remarkable document to the news conference.

But the chief fault did not lie with the architects, or with their developer, Park Tower Realty.

The president of Park Tower Realty, George Klein, attended yesterday's meeting but would not discuss what he would do next.

"We've been looking around in several countries for the past few years," said Veronica Hackett, executive vice president of Park Tower Realty.

The city, the Transit Authority and the lead developer, Park Tower Realty, have also each pledged $5 million in the event of cost overruns.

"We will stick it out to the end," George Klein, president of Park Tower Realty, said in an interview.

"No way," said Jayne Sacks Rosenhaus of Park Tower Realty, which manages the building.

The intention was to build 7,000 to 10,000 housing units on a platform above covered parking, with Park Tower Realty as joint-venture partner.

But officials of the 42d Street Development project, a joint undertaking of city and state, chose a then lesser-known developer, Park Tower Realty.

The branch and its programs are supported by Park Tower Realty and I.B.M., the developers of the building.