Managed C++/CLI

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an
object.
    at ClsEmail.Clone(ClsEmail* )
(truncated here)

Email *EmailBundle::GetEmail(long index)
        {
        if (!m_bundle) return 0;
        ClsEmail __nogc *e = m_bundle->GetEmail(index);
        if (!e) return 0;
        ClsEmail __nogc *e2 = e->Clone();  <---- Stack traceback indicates the failure is here
        if (!e2) return 0;
        Email *eTemp = new Email(e2);
        return eTemp;
        }

The stack traceback and error message indicate that "e" is not a valid
managed object, but e isn't a managed object in the first place.  

__property String __gc* get_Item(Int32 index)
{
}
__property void set_Item(Int32 index, String __gc* value)
{
}