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Answer 1

+2 A:

The dll for that ODBC is likely a 32bit only dll. Are you using this on a 64bit machine? If you are, IIS 7 has an option in the application pool that will allow you to "Enable 32-Bit Applications".

Joel Etherton 2010-06-11 13:24:47

I am using a 32 bit OS. I am on windows XP.The OracleDataAccess.dll is a 64 bit dll.I just found this by using the dumpbin.This is what my usage is32 bit exe --> 32 bit Dll --> 32 bit dll --> 64 bit dll (Oracle DataAccess.dll)

abhi 2010-06-11 14:03:44

Answer 2

A:

One possibility: Your programm is compiled with x64 or AnyCPU on a 64bit machine but the dll has been compiled with support for x86 only.
You can overcome this if you change the plattform of your Solution (or project) to x86.

I know you can force a 64bit Assembly to run as a 32bit app with:

corflags /32bit+ Oracle.DataAccess.dll

That works because the MSIL code is not bound to a processor architecture. However I never tried it the other way:

corflags /64bit+ Oracle.DataAccess.dll

so I can't tell if this works. And I propably won't work if the dll has unmanaged dependencies.

SchlaWiener 2010-06-11 13:31:39

corflags : error CF012 : The specified file is strong name signed. Use /Force to force the update.If I use Force, this is the message I get.corflags : warning CF011 : The specified file is strong name signed. Using /Force will invalidate the signature of this image and will require the assembly to be resigned.

abhi 2010-06-11 14:04:39

When using force you will get the message, but the file will be modified, too. http://stackoverflow.com/questions/1525857/corfflags-warning-cf011-about-strong-name-signed-even-after-forceIf you don't need the strong name then you should be fine.Anyway, I would recommend to set your main projects (the .exe) target plattform to x86 (look at my first suggestion) and leave your own dll's as "Any CPU".

SchlaWiener 2010-06-11 14:21:21

None of these are my own DLLs.The exe is the only code that I own.32 bit exe --> 32 bit Dll --> 32 bit dll --> 64 bit dll (Oracle DataAccess.dll)I have set the executable to target x86 platform. Changing that is not proving to be useful.

abhi 2010-06-11 14:24:27

Is this dll an original Ocacle file or just a third party dll that is named "Ocacle.DataAccess.dll"? If it is from Oracle itself, grab a 32bit copy (propably from here: http://www.oracle.com/technology/software/tech/windows/odpnet/index.html) and replace the dll with that.

SchlaWiener 2010-06-11 14:54:21

I did just that. Thanks SchlaWiener. I also had to clear teh GAC using GACUtil.exeNow my program throws a warning upon compilation, but it executes just I like I want it too.

abhi 2010-06-11 15:20:14

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