Based on the discussion, this seems to be a .NET issue. I'm closing it as "Invalid" (wish there were a better category)
** Changed in: nunitv2 Status: New => Invalid -- 2.5.5 x64 net-4.0 crash https://bugs.launchpad.net/bugs/597265 You received this bug notification because you are a member of NUnit Developers, which is subscribed to NUnit V2. Status in NUnit V2 Test Framework: Invalid Bug description: Running x64 based unit tests on x64 Windows Server 2008 R2. Get the following crash from VS2010 automating Nunit.exe. Testing Office 2010 Excel reading with x64 drivers. Running a single test works ok. Running a set of Excel tests causes the application crash. I suspect MS bug in the x64 data drivers, but this is the offending nunit test. ' Sheet Name and Row/Column Reference Console.WriteLine(String.Format(cNunitMessage, "Sheet Name and Row/Column Reference")) objDS = objExcel.GetDataSet(System.IO.Path.Combine(GetCurrentPath, "TestData\WithDataInSheet1.xlsx"), "Sheet1$B2:D10") If objDS.Tables.Count = 0 Then Assert.Fail("No data returned") End If If I run the nunit test by itself it works as expected. If I run all the tests in the nunit class it fails and crashes Nunit. The crash sends a lot of information to Microsoft. _______________________________________________ Mailing list: https://launchpad.net/~nunit-core Post to : nunit-core@lists.launchpad.net Unsubscribe : https://launchpad.net/~nunit-core More help : https://help.launchpad.net/ListHelp