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Editorial Team
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Asked: 2026-05-14T07:22:02+00:00

Exception: ProcessModel: Default DomainUsage: Single Execution Runtime: net-4.0 Unhandled Exception: System.ArgumentException: The net-4.0 framework

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Exception:
ProcessModel: Default DomainUsage: Single
Execution Runtime: net-4.0
Unhandled Exception:
System.ArgumentException: The net-4.0 framework is not available
Parameter name: framework
at NUnit.Util.TestAgency.GetAgent(RuntimeFramework framework, Int32 waitTime, Boolean enableDebug)
at NUnit.Util.ProcessRunner.Load(TestPackage package)
at NUnit.ConsoleRunner.ConsoleUi.Execute(ConsoleOptions options)
at NUnit.ConsoleRunner.Runner.Main(String[] args)

OS
Winserver 2008 R2 x64

Nunit
2.5.4.10098

Test assembly
Built for .net 4.0 RTM (v4.0.30319)

Commandline
nunit-console.exe NServiceBus.Config.UnitTests.dll /framework=net-4.0

Any ideas?

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1 Answer

  1. Editorial Team

    Combine Kev’s advice ( add /framework=4.0.30319 to the parameter list)
    and modify nunit-console.exe.config with the following:

    under

     <configuration>

    add:

    <startup>  <requiredRuntime version="v4.0.30319" /></startup>

    under <configuration><runtime> add:

     <legacyUnhandledExceptionPolicy enabled="1" />
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