Need Help TestFixtureSetUp failed

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Hello, 

I've been troubleshooting this error for a couple of days and I can seem to find out what is causing TestFixtureSetUp failed in my SpecFlow code.

My Specflow version is 2.1.0 and my Nunit version is 2.6.3.

I troubleshooted the obvious causes of this exception including making sure my setup fixtures are static for setup and tear down.

When i run my specflow tests in Visual studio they run fine however when I use NUnit's parallel execution i get the exception. 

I think its failing on the auto generated specflow feature cs fixtures but i do not know of a way to control the the auto generated fixtures. 

Anyone run into this issue and have insights or suggestions on how to troubleshoot are welcome. Thanks.

An example fixture:

 [NUnit.Framework.TestFixtureSetUpAttribute()]

        public virtual void FeatureSetup()

        {

            testRunner = TechTalk.SpecFlow.TestRunnerManager.GetTestRunner();

            TechTalk.SpecFlow.FeatureInfo featureInfo = new TechTalk.SpecFlow.FeatureInfo(new System.Globalization.CultureInfo("en-US"), "ApartmentComparableBuildingHistoryExport", null, ProgrammingLanguage.CSharp, ((string[])(null)));

            testRunner.OnFeatureStart(featureInfo);

        }

        

        [NUnit.Framework.TestFixtureTearDownAttribute()]

        public virtual void FeatureTearDown()

        {

            testRunner.OnFeatureEnd();

            testRunner = null;

        }