CHICAGO (MCT) — They entered the negotiating room in the Chicago Symphony Association’s lawyer’s office at 2 p.m. CDT Monday, and by about 6:45 p.m. a tentative agreement had been reached in the Chicago Symphony Orchestra’s first musicians’ strike in 21 years.

The orchestra announced shortly before 8 p.m. that the CSO musicians and management had reached a tentative agreement for a new, three-year collective bargaining agreement, which would take effect retroactively on Sept. 17. The previous contract expired Sept. 16.