class twisted.internet.task.SchedulerError(Exception): (source)
Known subclasses: twisted.internet.task.NotPaused, twisted.internet.task.SchedulerStopped, twisted.internet.task.TaskFinished
The operation could not be completed because the scheduler or one of its tasks was in an invalid state. This exception should not be raised directly, but is a superclass of various scheduler-state-related exceptions.