Debra Winger will have to wait to make her debut with the San Francisco Symphony.
The actress was to narrate "From the Diary of Anne Frank" under the baton of its composer and the symphony's music director, Michael Tilson Thomas, the symphony said.
But the orchestra's musicians decided not to perform Wednesday and Thursday because their 3-year contract expired last weekend.
Negotiations between the American Federation of Musicians and the San Francisco Symphony are continuing. Both sides have agreed not to discuss details.
There was no word on whether the concerts would be rescheduled. Ticket holders were offered refunds.