System.TypeLoadException: Could not load type 'TechTalk.SpecFlow.CucumberMessages.ICucumberMessageSender'

I was using this specflow versions:

And I tried to update all the packages to the last versions:

But now I cannot run my tests, all of them are skiped. I've checked the logs and the error that I've found is:

2021-11-25T11:48:02.1704852+01:00:2021-11-25T11:48:02.1701473+01:00:OutOfProcessTestAssemblyExecutor: RunTest error: System.TypeLoadException: Could not load type 'TechTalk.SpecFlow.CucumberMessages.ICucumberMessageSender' from assembly 'TechTalk.SpecFlow, Version=3.9.0.0, Culture=neutral, PublicKeyToken=0778194805d6db41'.
at System.Signature.GetSignature(Void* pCorSig, Int32 cCorSig, RuntimeFieldHandleInternal fieldHandle, IRuntimeMethodInfo methodHandle, RuntimeType declaringType)
at System.Reflection.RuntimeConstructorInfo.get_Signature()
at System.Reflection.RuntimeConstructorInfo.GetParametersNoCopy()
at System.Reflection.RuntimeConstructorInfo.GetParameters()
at BoDi.ObjectContainer.<>c.<CreateObject>b__68_0(ConstructorInfo ctor)
at System.Linq.Enumerable.Max[TSource](IEnumerable`1 source, Func`2 selector)
at BoDi.ObjectContainer.CreateObject(Type type, ResolutionList resolutionPath, RegistrationKey keyToResolve)
at BoDi.ObjectContainer.TypeRegistration.<>c__DisplayClass3_0.<ResolvePerContext>b__1()
at BoDi.ObjectContainer.RegistrationWithStrategy.ExecuteWithLock(Object lockObject, Func`1 getter, Func`1 factory, ResolutionList resolutionPath)
at BoDi.ObjectContainer.TypeRegistration.ResolvePerContext(ObjectContainer container, RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.RegistrationWithStrategy.Resolve(ObjectContainer container, RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.ResolveObject(RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.Resolve(Type typeToResolve, ResolutionList resolutionPath, String name)
at BoDi.ObjectContainer.<>c__DisplayClass71_0.<ResolveArguments>b__0(ParameterInfo p)
at System.Linq.Enumerable.SelectArrayIterator`2.ToArray()
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at BoDi.ObjectContainer.ResolveArguments(IEnumerable`1 parameters, RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.CreateObject(Type type, ResolutionList resolutionPath, RegistrationKey keyToResolve)
at BoDi.ObjectContainer.TypeRegistration.<>c__DisplayClass3_0.<ResolvePerContext>b__1()
at BoDi.ObjectContainer.RegistrationWithStrategy.ExecuteWithLock(Object lockObject, Func`1 getter, Func`1 factory, ResolutionList resolutionPath)
at BoDi.ObjectContainer.TypeRegistration.ResolvePerContext(ObjectContainer container, RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.RegistrationWithStrategy.Resolve(ObjectContainer container, RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.ResolveObject(RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.Resolve(Type typeToResolve, ResolutionList resolutionPath, String name)
at BoDi.ObjectContainer.Resolve(Type typeToResolve, String name)
at BoDi.ObjectContainer.Resolve[T](String name)
at BoDi.ObjectContainer.Resolve[T]()
at TechTalk.SpecFlow.TestRunnerManager.CreateTestRunnerInstance() in D:\a\1\s\TechTalk.SpecFlow\TestRunnerManager.cs:line 122
at TechTalk.SpecFlow.TestRunnerManager.CreateTestRunner(Int32 threadId) in D:\a\1\s\TechTalk.SpecFlow\TestRunnerManager.cs:line 55
at TechTalk.SpecFlow.TestRunnerManager.GetTestRunnerWithoutExceptionHandling(Int32 threadId) in D:\a\1\s\TechTalk.SpecFlow\TestRunnerManager.cs:line 155
at TechTalk.SpecFlow.TestRunnerManager.GetTestRunner(Int32 threadId) in D:\a\1\s\TechTalk.SpecFlow\TestRunnerManager.cs:line 136
at TechTalk.SpecFlow.TestRunnerManager.OnTestRunStart(Assembly testAssembly, IContainerBuilder containerBuilder) in D:\a\1\s\TechTalk.SpecFlow\TestRunnerManager.cs:line 232
at DboxxTests_SpecFlowPlusRunnerAssemblyHooks.AssemblyInitialize() in C:\Repos\DboxxTests\DboxxTests\DboxxTests\obj\Debug\net5.0\SpecFlow.Plus.Runner.AssemblyHooks.cs:line 12
at TechTalk.SpecRun.Framework.TaskExecutors.StaticOrInstanceMethodExecutor.ExecuteInternal(ITestThreadExecutionContext testThreadExecutionContext)
at TechTalk.SpecRun.Framework.TaskExecutors.StaticOrInstanceMethodExecutor.Execute(ITestThreadExecutionContext testThreadExecutionContext)
at TechTalk.SpecRun.Framework.TestAssemblyExecutor.RunAssemblyInitializeExecutors(ITestAssemblyExecutorsProvider testAssemblyExecutorsProvider, ITestThreadExecutionContext testThreadExecutionContext)
at TechTalk.SpecRun.Framework.TestAssemblyExecutor.RunTests(ITestAssemblyExecutorState executorState, ITestAssemblyExecutorsProvider testAssemblyExecutorsProvider, ITestThreadExecutionContext testThreadExecutionContext)
at TechTalk.SpecRun.Framework.TestAssemblyExecutor.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.Execution.InProcess.InProcAppDomainTestAssemblyExecutor.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.Execution.OutOfProcess.OutOfProcessTestAssemblyExecutor.RunTests(TestThreadState testThreadState)
2021-11-25T11:48:02.1709948+01:00:2021-11-25T11:48:02.1707871+01:00:OutOfProcessTestAssemblyExecutorReceiver - Error at RunTests - System.TypeLoadException: Could not load type 'TechTalk.SpecFlow.CucumberMessages.ICucumberMessageSender' from assembly 'TechTalk.SpecFlow, Version=3.9.0.0, Culture=neutral, PublicKeyToken=0778194805d6db41'.
at System.Signature.GetSignature(Void* pCorSig, Int32 cCorSig, RuntimeFieldHandleInternal fieldHandle, IRuntimeMethodInfo methodHandle, RuntimeType declaringType)
at System.Reflection.RuntimeConstructorInfo.get_Signature()
at System.Reflection.RuntimeConstructorInfo.GetParametersNoCopy()
at System.Reflection.RuntimeConstructorInfo.GetParameters()
at BoDi.ObjectContainer.<>c.<CreateObject>b__68_0(ConstructorInfo ctor)
at System.Linq.Enumerable.Max[TSource](IEnumerable`1 source, Func`2 selector)
at BoDi.ObjectContainer.CreateObject(Type type, ResolutionList resolutionPath, RegistrationKey keyToResolve)
at BoDi.ObjectContainer.TypeRegistration.<>c__DisplayClass3_0.<ResolvePerContext>b__1()
at BoDi.ObjectContainer.RegistrationWithStrategy.ExecuteWithLock(Object lockObject, Func`1 getter, Func`1 factory, ResolutionList resolutionPath)
at BoDi.ObjectContainer.TypeRegistration.ResolvePerContext(ObjectContainer container, RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.RegistrationWithStrategy.Resolve(ObjectContainer container, RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.ResolveObject(RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.Resolve(Type typeToResolve, ResolutionList resolutionPath, String name)
at BoDi.ObjectContainer.<>c__DisplayClass71_0.<ResolveArguments>b__0(ParameterInfo p)
at System.Linq.Enumerable.SelectArrayIterator`2.ToArray()
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at BoDi.ObjectContainer.ResolveArguments(IEnumerable`1 parameters, RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.CreateObject(Type type, ResolutionList resolutionPath, RegistrationKey keyToResolve)
at BoDi.ObjectContainer.TypeRegistration.<>c__DisplayClass3_0.<ResolvePerContext>b__1()
at BoDi.ObjectContainer.RegistrationWithStrategy.ExecuteWithLock(Object lockObject, Func`1 getter, Func`1 factory, ResolutionList resolutionPath)
at BoDi.ObjectContainer.TypeRegistration.ResolvePerContext(ObjectContainer container, RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.RegistrationWithStrategy.Resolve(ObjectContainer container, RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.ResolveObject(RegistrationKey keyToResolve, ResolutionList resolutionPath)
at BoDi.ObjectContainer.Resolve(Type typeToResolve, ResolutionList resolutionPath, String name)
at BoDi.ObjectContainer.Resolve(Type typeToResolve, String name)
at BoDi.ObjectContainer.Resolve[T](String name)
at BoDi.ObjectContainer.Resolve[T]()
at TechTalk.SpecFlow.TestRunnerManager.CreateTestRunnerInstance() in D:\a\1\s\TechTalk.SpecFlow\TestRunnerManager.cs:line 122
at TechTalk.SpecFlow.TestRunnerManager.CreateTestRunner(Int32 threadId) in D:\a\1\s\TechTalk.SpecFlow\TestRunnerManager.cs:line 55
at TechTalk.SpecFlow.TestRunnerManager.GetTestRunnerWithoutExceptionHandling(Int32 threadId) in D:\a\1\s\TechTalk.SpecFlow\TestRunnerManager.cs:line 155
at TechTalk.SpecFlow.TestRunnerManager.GetTestRunner(Int32 threadId) in D:\a\1\s\TechTalk.SpecFlow\TestRunnerManager.cs:line 136
at TechTalk.SpecFlow.TestRunnerManager.OnTestRunStart(Assembly testAssembly, IContainerBuilder containerBuilder) in D:\a\1\s\TechTalk.SpecFlow\TestRunnerManager.cs:line 232
at DboxxTests_SpecFlowPlusRunnerAssemblyHooks.AssemblyInitialize() in C:\Repos\DboxxTests\DboxxTests\DboxxTests\obj\Debug\net5.0\SpecFlow.Plus.Runner.AssemblyHooks.cs:line 12
at TechTalk.SpecRun.Framework.TaskExecutors.StaticOrInstanceMethodExecutor.ExecuteInternal(ITestThreadExecutionContext testThreadExecutionContext)
at TechTalk.SpecRun.Framework.TaskExecutors.StaticOrInstanceMethodExecutor.Execute(ITestThreadExecutionContext testThreadExecutionContext)
at TechTalk.SpecRun.Framework.TestAssemblyExecutor.RunAssemblyInitializeExecutors(ITestAssemblyExecutorsProvider testAssemblyExecutorsProvider, ITestThreadExecutionContext testThreadExecutionContext)
at TechTalk.SpecRun.Framework.TestAssemblyExecutor.RunTests(ITestAssemblyExecutorState executorState, ITestAssemblyExecutorsProvider testAssemblyExecutorsProvider, ITestThreadExecutionContext testThreadExecutionContext)
at TechTalk.SpecRun.Framework.TestAssemblyExecutor.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.Execution.InProcess.InProcAppDomainTestAssemblyExecutor.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.Execution.OutOfProcess.OutOfProcessTestAssemblyExecutor.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.Execution.OutOfProcess.OutOfProcessTestAssemblyExecutorReceiver.RunTests(TestThreadState testThreadState)
2021-11-25T11:48:02.1862204+01:00:test thread #0 error: StreamJsonRpc.RemoteInvocationException: Could not load type 'TechTalk.SpecFlow.CucumberMessages.ICucumberMessageSender' from assembly 'TechTalk.SpecFlow, Version=3.9.0.0, Culture=neutral, PublicKeyToken=0778194805d6db41'.
at StreamJsonRpc.JsonRpc.InvokeCoreAsync[TResult](Nullable`1 id, String targetName, IReadOnlyList`1 arguments, CancellationToken cancellationToken, Boolean isParameterObject)
at TechTalk.SpecFlow.Plus.RPC.TcpRpcClient.Invoke[T](String methodName, Object[] parameters)
at TechTalk.SpecFlow.Plus.RPC.AsyncHelper.RunSync[TResult](Func`1 func)
at TechTalk.SpecRun.Framework.Execution.OutOfProc.StreamJsonRPC.OutOfProcessTestAssemblyExecutorClient.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.Execution.OutOfProc.StreamJsonRPC.RemoteExecutor.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.Execution.OutOfProc.StreamJsonRPC.OutOfProcessTestAssemblyExecutorHost.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.TestThread.RunNonEmptyTestSuite(CancellationToken cancellationToken, TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.TestThread.Run(ITestExecutionManager executionManagerForRun, CancellationToken cancellationToken)
at TechTalk.SpecRun.Framework.AsyncTestThreadRunner.RunSync(TestExecutionManager executionManager, CancellationToken cancellationToken)
2021-11-25T11:48:02.1870269+01:00:test thread error: TechTalk.SpecRun.Framework.SpecRunException: At least one test thread aborted.
---> StreamJsonRpc.RemoteInvocationException: Could not load type 'TechTalk.SpecFlow.CucumberMessages.ICucumberMessageSender' from assembly 'TechTalk.SpecFlow, Version=3.9.0.0, Culture=neutral, PublicKeyToken=0778194805d6db41'.
at StreamJsonRpc.JsonRpc.InvokeCoreAsync[TResult](Nullable`1 id, String targetName, IReadOnlyList`1 arguments, CancellationToken cancellationToken, Boolean isParameterObject)
at TechTalk.SpecFlow.Plus.RPC.TcpRpcClient.Invoke[T](String methodName, Object[] parameters)
at TechTalk.SpecFlow.Plus.RPC.AsyncHelper.RunSync[TResult](Func`1 func)
at TechTalk.SpecRun.Framework.Execution.OutOfProc.StreamJsonRPC.OutOfProcessTestAssemblyExecutorClient.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.Execution.OutOfProc.StreamJsonRPC.RemoteExecutor.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.Execution.OutOfProc.StreamJsonRPC.OutOfProcessTestAssemblyExecutorHost.RunTests(TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.TestThread.RunNonEmptyTestSuite(CancellationToken cancellationToken, TestThreadState testThreadState)
at TechTalk.SpecRun.Framework.TestThread.Run(ITestExecutionManager executionManagerForRun, CancellationToken cancellationToken)
at TechTalk.SpecRun.Framework.AsyncTestThreadRunner.RunSync(TestExecutionManager executionManager, CancellationToken cancellationToken)
--- End of inner exception stack trace ---

I have not been able to find a solution, but as soon as I rollback to previous versions it works fine

Official comment

Andreas Willich

December 23, 2021 12:22

SpecFlow+ Runner 3.9.31 is released to NuGet.org, which works again with SpecFlow 3.9.40.

Jordan Western

November 26, 2021 15:51

Lluis Bonet,

You're not the first to raise this, we are working on it :)

Will let you know once we have resolved the issue.

Lluis Bonet

November 29, 2021 08:03

Jordan Western,

Thanks for your response, I will be waiting for this update thanks!

Brett Roberts

November 29, 2021 16:21

I too, am experiencing this after upgrading my NuGets to:

SpecFlow 3.9.40
SpecFlow.Tools.MsBuild.Generation 3.9.40
SpecRun.SpecFlow 3.9.7

Now I cannot run my tests, can you suggest a downgrade path that will get me working again?

Thanks

November 30, 2021 09:18

Downgraded my nugets as below

SpecRun.SpecFlow 3.8.12
SpecFlow.Tools.MsBuild.Generation 3.8.14
SpecFlow 3.9.14
SpecFlow.Plus.LivingDocPlugin uninstalled as I dont use it that often

Things seem to work now.

Lesson learned.

November 30, 2021 09:36

Hey Brett Roberts, Lluis Bonet

As you mention the downgrade will work, it is version 3.9.40 that does not have the ICucumberMessageSender.

version 3.9.22 should be the last version that works until we fix this.

November 30, 2021 10:36

Hi Jordan Western,

thanks for your response indeed this downgrade solved the issue, I'll wait for the next specflow version.

Svitlana Plotnikova

February 08, 2023 06:58

Hello

this issue is already 1 year old. Is there any fix for it besides downgrade?

Best regards

Svetlana

February 08, 2023 07:20

Hi Svitlana Plotnikova

since they stop maintaining the Speclflow Runner I switch to xUnit and everything works smoothly in the last version

February 08, 2023 07:48

Hi Lluis,

thank you for your response.

I just use Specflow SpecFlow.Internal.Json, Specflow.Tools.MsBuild.Generation, Specflow.MSTest

So it means I should replace SpecFlow.MSTest with Specflow.xUnit?

February 08, 2023 07:52

Svitlana Plotnikova here you will find documentation that might help you https://docs.specflow.org/projects/specflow/en/latest/Integrations/MsTest.html

February 08, 2023 10:28

Yes I'm referencing these packages, but still..., Is there something I might be missing?

February 08, 2023 10:57 Edited

I have never used MS test, I use these nugets:

<PackageReference Include="SpecFlow" Version="3.9.74" />
<PackageReference Include="SpecFlow.Assist.Dynamic" Version="1.4.2" />
<PackageReference Include="SpecFlow.Contrib.Variants" Version="3.9.74" />
<PackageReference Include="SpecFlow.Plus.LivingDocPlugin" Version="3.9.57" />
<PackageReference Include="SpecFlow.Tools.MsBuild.Generation" Version="3.9.74" />
<PackageReference Include="SpecFlow.xUnit" Version="3.9.74" />
<PackageReference Include="xunit" Version="2.4.2" />
<PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">

System.TypeLoadException: Could not load type 'TechTalk.SpecFlow.CucumberMessages.ICucumberMessageSender'

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