A list item is changed via an Event Receiver. In the history list of that item I see the Change and a new Version is created.
My workflow Option "Start when items are modified" = "YES", nevertheless the workflow did not start.
What is the reason and how can I start a workflow in this case?
The SPItemEventReceiver class has an EventFiringEnabled property. If the event receiver sets this property to false, it may prevent workflows from starting on update.