I'm trying to add a field into an existing feature and when doing so i get the following error:
We are on ArcSDE with SQL being the server DBMS.
I'm on ArcGIS Desktop 10.5.1
IT department has looked into things on the database & server side and haven't found anything out of the norm.
Any help would be appreciated
Thanks
Are you connected as the data owner? What are your permissions according to ArcCatalog on the feature class.
There are some notes at the top of the help that may be present: Adding fields—Help | ArcGIS Desktop