I have an SQL Server 2012 database that had non-GIS table data. With ArcGIS 10.1, I did an "Enable Geodatabase" to make it GIS worthy. I'm now trying to work with those tables but can't do anything with them (See attachment). Shouldn't they have been Registered with the GDB? All I can think is that they have a different schema than the other GIS data. Catalog used the "dbo" schema and the original non-GIS tables used pdq. I'm new to all this so I'm stumped.
All the Enable Geodatabase does is create the tables that *permit* geodatabase registration. You still need to register the individual tables you want to participate in geodatabase functionality. If all tables were automatically registered, there could be scads of errors generated by unsupported datatypes, etc., and then and subsequent DROP TABLE commands could corrupt the geodatabase metadata.