I am using OS/X 10.8.5. I have SQL Developer and Instant Client 11.2 installed and working fine.
I have recently installed Oracle Data Modeler 22.214.171.1247 and am trying to synchronize my model with the DB.
When I try and add a connection if I set the connection type to TNS (which works just fine in SQL Developer), it doesn't show any of my tnsnames.ora entries in the 'Network Alias' drop down.
So I instead tried creating a connection of type 'Basic'. That _seemed_ to work OK - in that when I clicked 'Test' on the connection it returned success. However when I tried to use that connection it returned immediately with the error 'Closed Connection'.
Any suggestions would be gratefully received.