A labor dispute is affecting opera performances. Two shows have been canceled due to a strike by musicians. The musicians and management are still negotiating a new contract, but they remain far apart.

A third show, "Simon Boccanegra," is scheduled for Thursday, and its status is uncertain. There is no indication that an agreement will be reached before then.

Further information about the dispute and its impact on performances is available from the source. Details about the negotiations and the contract terms are not specified, but it is clear that the parties have not yet come to an agreement.