'System.BadImageFormatException: Could not load file or assembly' when Running Tests Inside Visual Studio

(Doc ID 1309925.1)

Last updated on JULY 05, 2017

Applies to:

Oracle Data Provider for .NET - Version: and later   [Release: and later ]
Microsoft Windows x64 (64-bit)
Visual Studio 2008


The Visual Studio 2008 application works when the run-time executable is launched.  But, when the Visual Studio Test menu is used to run tests against the application the following error occurs:

System.BadImageFormatException: Could not load file or assembly 'Oracle.DataAccess, Version=, Culture=neutral, PublicKeyToken=89b483f429c47342' or one of its dependencies.

An attempt was made to load a program with an incorrect format.

The application is using 64-bit Oracle Client Software and a 64-bit interface such as the Oracle Data Provider for .NET (ODP.NET).


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