I am getting System.BadImageFormatException : The operating system cannot run exception while running unit tests

Question

I am working on a Winforms project. Currently I am facing a problem that running some of the test cases throw

    System.BadImageFormatException : The operating system cannot run . 
(Exception from HRESULT: 0x800700B6)

exception. This happens only if I run tests through NUnit. However, if I run the application through the code, it works fine.

Remoting is being used in the application. Can that be an issue?

zmbq · Answer 1 · 2012-06-07T05:45:52.770

1

Make sure both NUNIT and your code are compiled to the same platform - x86 or x64. The easiest thing to set the platform to 'Any CPU' on your code.

edited Jun 07 '12 at 05:45

answered Jun 07 '12 at 05:40

zmbq

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It is a called 'AnyCPU' not 'both' ;p – leppie Jun 07 '12 at 05:41
How can I check what platform NUnit was compiled to? – Varun Mahajan Jun 07 '12 at 05:42
Just change your settings to 'any cpu' (thanks @leppie), it should work no matter how NUnit is compiled. – zmbq Jun 07 '12 at 05:46
It is 'AnyCPU' already. It was my first hunch. But it did not work – Varun Mahajan Jun 07 '12 at 05:50
I am working on an x86 machine. so, will it make sense to change to x64? – Varun Mahajan Jun 07 '12 at 05:55

score 0 · Answer 2 · answered Jun 20 '12 at 09:59

I had similar issue but in my case configuration file for application helped . This file contained following entries:

<configuration>
    <startup useLegacyV2RuntimeActivationPolicy="true">
        <requiredRuntime version="v4.0" />
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" />
    </startup>
</configuration>

I am getting System.BadImageFormatException : The operating system cannot run exception while running unit tests

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