[NullReferenceException: Object reference not set to an instance of an object.]
   NHibernate.Util.ReflectHelper.GetGetter(Type theClass, String propertyName, String propertyAccessorName) in C:\Documents and Settings\Symon\My Documents\Visual Studio Projects\Third Party Components\nhibernate-1.0.0.0\src\NHibernate\Util\ReflectHelper.cs:102
   NHibernate.Util.ReflectHelper.ReflectedPropertyType(Type theClass, String name, String propertyAccess) in C:\Documents and Settings\Symon\My Documents\Visual Studio Projects\Third Party Components\nhibernate-1.0.0.0\src\NHibernate\Util\ReflectHelper.cs:164
   NHibernate.Mapping.SimpleValue.SetTypeByReflection(Type propertyClass, String propertyName, String propertyAccess) in C:\Documents and Settings\Symon\My Documents\Visual Studio Projects\Third Party Components\nhibernate-1.0.0.0\src\NHibernate\Mapping\SimpleValue.cs:155
   NHibernate.Cfg.Binder.BindRootClass(XmlNode node, RootClass model, Mappings mappings) in C:\Documents and Settings\Symon\My Documents\Visual Studio Projects\Third Party Components\nhibernate-1.0.0.0\src\NHibernate\Cfg\Binder.cs:351
   NHibernate.Cfg.Binder.BindRoot(XmlDocument doc, Mappings model) in C:\Documents and Settings\Symon\My Documents\Visual Studio Projects\Third Party Components\nhibernate-1.0.0.0\src\NHibernate\Cfg\Binder.cs:1536
   NHibernate.Cfg.Configuration.AddValidatedDocument(XmlDocument doc) in C:\Documents and Settings\Symon\My Documents\Visual Studio Projects\Third Party Components\nhibernate-1.0.0.0\src\NHibernate\Cfg\Configuration.cs:228
   NHibernate.Cfg.Configuration.AddXmlReader(XmlTextReader hbmReader) in C:\Documents and Settings\Symon\My Documents\Visual Studio Projects\Third Party Components\nhibernate-1.0.0.0\src\NHibernate\Cfg\Configuration.cs:542
   NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream) in C:\Documents and Settings\Symon\My Documents\Visual Studio Projects\Third Party Components\nhibernate-1.0.0.0\src\NHibernate\Cfg\Configuration.cs:425

access="Framework.Core.CustomPropertyAccessor, Framework.Core"

      public static IGetter GetGetter( System.Type theClass, string propertyName, string propertyAccessorName )
      {
         IPropertyAccessor accessor = null;

         try
         {
            // first try the named strategy since that will be the most likely strategy used.
            accessor = ( IPropertyAccessor ) PropertyAccessorFactory.PropertyAccessors[ propertyAccessorName ];
            return accessor.GetGetter( theClass, propertyName );
         }
         catch( PropertyNotFoundException )
         {
            // the basic named strategy did not work so try the rest of them
            foreach( DictionaryEntry de in PropertyAccessorFactory.PropertyAccessors )
            {
               try
               {
                  accessor = ( IPropertyAccessor ) de.Value;
                  return accessor.GetGetter( theClass, propertyName );
               }
               catch( PropertyNotFoundException )
               {
                  // ignore this exception because we want to try and move through
                  // the rest of the accessor strategies.
               }
            }
            throw;
         }
      }