Pittsburgh City Council tonight passed a motion compelling Mayor Luke Ravenstahl to appear at a meeting tomorrow to discuss the city’s pension crisis. The motion followed hours of heated discussion over a bailout plan that council proposed and Mr. Ravenstahl summarily rejected today. Five council members and City Controller Michael Lamb gathered behind a podium this morning to say they’d fashioned the best possible resolution to the pension issue. They said they needed Mr. Ravenstahl’s support, but he called the plan unworkable and declined to support it. The plan revolved around the idea of shoring up the pension fund not with cash but with a different asset — 30 years of dedicated revenue from parking-rate increases. Council members introduced enabling legislation today but postponed a vote until the meeting with Mr. Ravenstahl. They decided to compel Mr. Ravenstahl’s attendance because they said they were frustrated with dealing with his subordinates.