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Editorial Team
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Asked: 2026-05-15T07:46:36+00:00

I could make a dll for NUnit NUnit test under mono , but when

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I could make a dll for NUnit NUnit test under mono, but when I tried to run in with nunit-console.exe I get the following error message.

Runtime Environment - 
   OS Version: Unix 10.3.0.0
  CLR Version: 2.0.50727.1433 ( 2.6.4 (tarball Thu Apr 22 13:24:33 MDT 2010) )

ProcessModel: Default    DomainUsage: Single
Execution Runtime: mono-2.0

** (/Users/smcho/bin/NUnit-2.5.5.10112/bin/net-2.0/nunit-console.exe:36800): WARNING **: The following assembly referenced from /private/var/folders/m4/m4u1hmP+FHOQaiZbHj1UCk+++TI/-Tmp-/nunit20/ShadowCopyCache/36800_634111616836311880/Tests_-22323139/assembly/shadow/54274fc2/118e035c_45a94c9e_00000001/mut.dll could not be loaded:
     Assembly:   nunit.framework    (assemblyref_index=1)
     Version:    2.5.5.10112
     Public Key: 96d09a1eb7f44a77
System error: Invalid argument


** (/Users/smcho/bin/NUnit-2.5.5.10112/bin/net-2.0/nunit-console.exe:36800): WARNING **: Could not load file or assembly 'nunit.framework, Version=2.5.5.10112, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77' or one of its dependencies.

What might be wrong? I have nunit.framework.dll under /Users/smcho/bin/NUnit-2.5.5.10112/bin/net-2.0/framework, but it doesn’t seem to know about this.

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1 Answer

  1. Editorial Team

    This is another frustrating point about using NUnit in Mono. As far as I’ve been able to tell, you need to have all of those missing files (there will be more than just nunit.framework.dll) in the same directory as nunit-console.exe.

    There might be a command line option either in mono or nunit-console.exe to specify another directory to search for missing DLLs — I’m not sure. Barring that, you’ll have to copy the missing DLLs into the same folder as nunit-console.exe, or you’ll have to cd into the framework folder and use mono ../nunit-console.exe /path/to/my/tests.dll

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