In a web application I use 2 connections to 2 different servers of Oracle 10g, I use Visual Studio 2015 Professional, and I have installed Oracle ODAC 12 libraries in the development computer, I have referenced in the application said library Oracle.DataAccess.dll
.
The fact is that the connection to one of the servers works correctly and when you open the connection to another I report the error:
ORA-03134: Connections to this server version are no longer supported
Can you give me any clue as to where the problem is going? Apparently both ORACLE servers have the same configuration.