OracleException (0x80004005) When Connecting to Oracle Database

Question

I\'ve developed a simple C#, .net 4.0 website which I\'d like to deploy onto an IIS test server. I am using the Oracle.DataAccess assembly to connect to an Oracle database,

Answer 1

While you did not get a specific error message, there's a good chance that there is an incompatibility with ODP.Net (version numbers, 32bit vs 64bit DLLs) installed locally vs. on your test server.

This answer has several options which might help.