When I launched this script I got an error:
System.Reflection.TargetInvocationException: System.Runtime.InteropServices.COMException (0x8000FFFF):
( HRESULT: 0x8000FFFF (E_UNEXPECTED))

Here is the stack fragment:
Sony.Vegas.IMarkerCOM.GetPosition(UInt32 sessionID, Int64& position)
Sony.Vegas.Marker.get_Position()
EntryPoint.FromVegas(Vegas vegas)
System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
Sony.Vegas.ScriptHost.ScriptManager.Run(Assembly asm, String className, String methodName)
Sony.Vegas.ScriptHost.CodeDomScriptManager.Run()
Sony.Vegas.ScriptHost.RunScript(Boolean fCompileOnly)

I have Vegas Pro 8. In previous versions it worked successfully.
Is it a bug or smth wrong with my Vegas ?