I'm working with a Visual Basic developer who only knows to compile with the new 12c Oracle.Data.Access.dll moving from Oracle database 11.2 to 12c. So far he can only get one dll to compile but nothing to connection and he gets "dependency error". We are also moving from a Windows 32bit 2003 app server to a 64bit Windows 2012R2 server.
I loaded 12C ODAC and tested it per Oracle support instructions so I'm confident that connection works. This is all we did in the past moving from Oracle 10 to 11. Since at this point "I don't know what I don't know" is there anything else our VB developer needs to do to get his code to work with a 12C database?