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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 .

SQL Server 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

Ps : we have enabled Allow in Process in Sql Server for Oracle Provider

anyone got any ideas on this and what can be done to avoid this happen again

many thanks

Ray

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You need to figure out what changed in the environment around that time (Windows Updates? Service pack application?). Things don't usually blow up by themselves without some kind of provocation. –  Jon Seigel Aug 6 '13 at 16:58
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I was having same error when i was connecting SQL Server with MySQL the issue was due to wrong Username or password in Local Server login to remote server login mapping.

Check if its correct or not !

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