I am having a bit of a linked server problem.
I created a SQL Server linked server and it's been working fine for last 2 years and suddenly not working.
Microsoft SQL Server 2005 - 9.00.5324.00 (X64) Aug 24 2012 18:28:47 Copyright (c) 1988-2005 Microsoft Corporation Enterprise Edition (64-bit) on Windows NT 5.2 (Build 3790: Service Pack 2)
Oracle client version
Oracle - OraClient11g_home1
Cannot create an instance of OLE DB provider "OraOLEDB.Oracle" for linked server.
We have enabled Allow in Process in SQL Server for the Oracle Provider.
Has anyone got any ideas on this and what can be done to avoid this happening again?