Thanks for your reply,

The desktop and license manager are running 10.5.1

It doesn’t seem to matter if the anno feature class is in a geometric network or not or if it is verstioned-those things don’t seem to matter. However, when I stop running ArcGIS Server it allows me to change the anno classes in the anno feature class. I just don’t want to have to stop ArcGIS Server to make changes. Schema locks are bad enough in ArcGIS.

Regards,

Dan