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Could not load file or assembly ‘Oracle.DataAccess’ or one of its dependencies. An attempt was made to load a program with an incorrect format.
Could not load file or assembly ‘Oracle.DataAccess’ or one of its dependencies. An attempt was made to load a program with an incorrect format. avatar

January 24, 2012 By Juan Camilo Zapata Montúfar Leave a Comment

If you are facing this same error “Could not load file or assembly ‘Oracle.DataAccess’ or one of its dependencies. An attempt was made to load a program with an incorrect format.” using the Oracle.DataAccess assembly in my case , and only if it happens using the iis version of your WCF service, but running it directly from Visual Studio works , then you problem is on the Application Pool on your IIS

Go to the Application Pool of your application on the IIS:

Select Advanced Settings:

And change Enable 32-bit Applications to TRUE

And finally make an IIS Reset

This option solve my problem.

Filed Under: IIS, Oracle Data Adapter, WCF Tagged With: An attempt was made to load a program with an incorrect format., Could not load file or assembly, Could not load file or assembly 'Oracle.DataAccess', Oracle DataAccess dependencies, Oracle dependencies, Oracle dll format, Oracle.DataAccess, WCF dll

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