Attempt to load Oracle client libraries threw BadImageFormatException. This problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed

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While trying to connect to oracle database from .net getting the following exception:

"Attempt to load Oracle client libraries threw BadImageFormatException. This problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed."

After going through many links i tried to overcome this exception by changing the platform target to Any CPU.When i changed the target platform it is working fine.

Since the application uses Clearquest and HPQC dlls and they are of 32 bits and when i am using it with platform target as any cpu or x64 , getting exception as

"Retrieving the COM class factory for component with CLSID {94773112-72E8-11D0-A42E-00A024DED613} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))."

The environment on which i am working is: Windows server 2008,
.net framework 4.0, oracle 11g (64-bit)

can anyone tell me.how to fix it?

Posted 19-Mar-13 23:32pm

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Jörgen Andersson · Answer 1 · 2013-03-20T04:17:00

Solution 1

If clearquest is only available as 32bit dlls you obviously can't run it under 64 bits.

Set your projects targetCPU to x86 and install the 32 bit Oracle Client.

Posted 20-Mar-13 4:17am

Jörgen Andersson