Within my C# project, I'm having the same issue as the one mentioned by Alex Olaf in this thread:
CLOB and null bug
I followed the instructions that recommended downloading the package:
ODAC 12c Release 4 and Oracle Developer Tools for Visual Studio (12.1.0.2.4)
And installed it onto my dev machine. I then copied the Oracle.ManagedDataAccess.dll from that installation and replaced the older one on our QA machine, running our project's executable and getting the error once more.
What are your recommended steps to fix the problem?