Sorry for the common error. I have checked old discussion and cannot find one same as mine. I hope someone here have encounter this before and tell me how to fix (or tell me no way to fix).
We are working on a SP2010 farm. There is an event receiver "xxx". It was deployed as farm solution and is listening on ListTemplateId="115". We no longer need it so we (a)deactivate the feature, (b) retract from farm solution, (c) remove from farm solution. After that everything is working fine.
After about 2 weeks, we patch the servers. After patch, event viewer shows
Event manager error: Could not load file or assembly xxx ........... or one of its dependencies. The system cannot find the file specified. whenever the "list A" have new item added. Before the error, everything else is working fine.
May I know how should I troubleshoot it?
I found article talking about remove orphan receivers from a list or a content type. How about list template ID?