Since converting to ArcMap 10.6.1 this week, I can no longer see my enterprise (SDE) locks. I usually view them through the ArcCatalog Administer database dialog, but I have tried selecting users and versions, looking for specific types of locks, and even running from ArcCatalog within ArcMap. They all yield a pop-up with the message "Column value is null". This problem is not an issue right now, but it can be when I making a lot of schema changes or we get a phantom lock that won't go away.
Is there a script or other way around this issue? I have no access to the underlying SQL Server 2014 tools.
You may want to look at this post; https://community.esri.com/thread/206938-error-trying-to-view-locks
I know that you are at 10.6.1 but it may have popped up in 10.6.1
I would recommend contacting Esri Tech Support for more help.
Thanks. I can't search the Geodatabase group for previous posts. So I will ask my admin to look for ownerless locks and kill them.