I'm trying to connect to a database with SQL Developer 4, using OS authentication on Windows 7, so I have Advanced > Use OCI/Thick driver enabled (that's the only way OS authentication works). This used to work. Today I'm getting this:
An error was encountered performing the requested operation:
Internal Error: Fetch error message failed!
Vendor code 17001
The only thing that's changed is in addition to the Oracle 11 client I always had, I now also have ODAC 12 for the Oracle .net developer tools. That came with it's own copy of the Instant Client, which I assume is what's breaking things. Anybody know if that's supposed to work, or what to do instead?