Hi, I am trying to integrate NUnit with our current automated test tool. I copied the two PythonNet dlls, Python.Runtime.dll and CLR.dll, into the ActiveState Python 2.3 directory. When I try to run my wrapper module, ATFAdaptor.cs, which is a stripped down/modified version of the ConsoleUi.cs file, I receive the following CLR Exception: ex.Message: Request for the permission of type System.Security.Permissions.FileIOPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 failed. ex.Stacktrace: Server stack trace: at System.Security.CodeAccessSecurityEngine.CheckHelper(PermissionSet grantedSet, PermissionSet deniedSet, CodeAccess Permission demand, PermissionToken permToken) at System.Security.CodeAccessSecurityEngine.Check(PermissionToken permToken, CodeAccessPermission demand, StackCrawlM ark& stackMark, Int32 checkFrames, Int32 unrestrictedOverride) at System.Security.CodeAccessSecurityEngine.Check(CodeAccessPermission cap, StackCrawlMark& stackMark) at System.Security.CodeAccessPermission.Demand() at System.IO.Directory.GetCurrentDirectory() at System.Environment.get_CurrentDirectory() at NUnit.Core.TestSuiteBuilder.Load(String assemblyName) at NUnit.Core.TestSuiteBuilder.Build(String assemblyName, Int32 assemblyKey) at NUnit.Core.TestSuiteBuilder.Build(String assemblyName) at NUnit.Core.RemoteTestRunner.Load(String assemblyName) at System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage (MethodBase mb, Object[] args, Object serv er, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IM essage msg, Int32 methodPtr, Boolean fExec uteInContext) Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at NUnit.Core.TestRunner.Load(String assemblyName) at NUnit.Util.TestDomain.Load(String assemblyFileName, String testFixture) at NUnit.Util.TestDomain.Load(NUnitProject project, String testFixture) at NUnit.ATF.ATFAdaptor.Run() in c:\documents and settings\sweeneym\my documents\visual studio projects\nunit-2.2.0\a tf2nunitadaptor\atfadaptor.cs:line 277 It looks like the regular CPython version has some sort of permission problems interacting between managed code and python. Is this something I can work around, or fix? Also, if I run the wrapper module with the PythonNET version of the python.exe, the wrapper can execute the NUnit test, but hangs afterwards. Thanks in advance... Mike