I have a wsp which basically contains a Workflow and an Event Receiver (Item Updating). I deployed it, and then had to retract the solution. Now I'm getting an error every time I try to update an item. Looking at Fusion Log, here's the detail:
Event manager error: Could not load file or assembly `...` or one of its dependencies. The system cannot find the file specified.
I have checked and the dll is no longer in GAC, the feature is no longer available, and the solution does not existe anymore, so I don't know who is trying to call this dll.